Wednesday, December 17, 2008

Mercenaries

March 29, 2004 "The Independent" -- An army of thousands of mercenaries has appeared in Iraq's major cities, many of them former British and American soldiers hired by the occupying Anglo-American authorities and by dozens of companies who fear for the lives of their employees. Many of the armed Britons are former SAS soldiers and heavily armed South Africans are also working for the occupation. "My people know how to use weapons and they're all SAS," said the British leader of one security team in southern Baghdad. "But there are people running around with guns now who are just cowboys. We always conceal our weapons, but these guys think they're in a Hollywood film." There are serious doubts even within the occupying power about America's choice to send Chilean mercenaries, many trained during General Pinochet's vicious dictatorship, to guard Baghdad airport. Many South Africans are in Iraq illegally--they are breaking new laws, passed by the government in Pretoria, to control South Africa's booming export of mercenaries. Many have been arrested on their return home because they are do not have the licence now required by private soldiers. Casualties among the mercenaries are not included in the regular body count put out by the occupation authorities, which may account for the persistent suspicion among Iraqis that the US is underestimating its figures of military dead and wounded. Some British experts claim that private policing is now the UK's biggest export to Iraq--a growth fueled by the surge in bomb attacks on coalition forces, aid agencies and UN buildings since the official end of the war in May last year. Many companies operate from villas in middle-class areas of Baghdad with no name on the door. Some security men claim they can earn more than lbs80,000 a year; but short-term, high-risk mercenary work can bring much higher rewards. Security personnel working a seven-day contract in cities like Fallujah, can make $1,000 a day. Although they wear no uniform, some security men carry personal identification on their flak jackets, along with their rifles and pistols. Others refuse to identify themselves even in hotels, drinking beer by the pool, their weapons at their feet. In several hotels, guests and staff have complained that security men have held drunken parties and one manager was forced to instruct mercenaries in his hotel that they must carry their guns in a bag when they leave the premises. His demand was ignored. One British company director, David Claridge of the security firm Janusian, has estimated that British firms have earned up to lbs800m from their contracts in Iraq--barely a year after the invasion of Iraq. One British-run firm, Erinys, employs 14,000 Iraqis as watchmen and security guards to protect the country's oil fields and pipelines. The use of private security firms has led to some resentment amongst the Department for International Development's aid workers--who fear it undermines the trust of Iraqi civilians. "DFID staff would prefer not to have this," said one source. "It's much easier for them to do their job without any visible security, but the security risks are great down there." One South African-owned firm, Meteoric Tactical Solutions, has a lbs270,000 contract with DFID which, it is understood, involves providing bodyguards and drivers for its most senior official in Iraq and his small personal staff. Another British-owned company, ArmorGroup has an lbs876,000 contract to supply 20 security guards for the Foreign Office. That figure will rise by 50 per cent in July. The firm also employs about 500 Gurkhas to guard executives with the US firms Bechtel and Kellogg Brown & Root. Opposition MPs were shocked by the scale of the Government's use of private firms to guard British civil servants, and claimed it was further evidence that the British army was too small to cope. Menzies Campbell, the Liberal Democrat's foreign affairs spokesman, said: "This suggests that British forces are unable to provide adequate protection and raises the vexed question of overstretch--particularly in light of the remarks by the Chief of the Defence Staff, last week that Britain couldn't stage another operation on the scale of Iraq for another five years." Andrew Robathan, a Tory MP on the international development select committee and former SAS officer, said: "The Army doesn't have the troops to provide static guards on this scale. Surely it would have been cheaper to have another battalion of troops providing guards." The UK's largest private security firm in Iraq, Global Risk Strategies, is helping the coalition provisional authority and the Iraqi administration to draft new regulations. It is expecting to increase its presence from 1,000 to 1,200 staff this spring, and could reach 1,800 this year. However, aid charities are disturbed by the sums being spent on security, since DFID has diverted lbs278m from its mainstream aid budget for Iraqi reconstruction. Dominic Nutt, of Christian Aid, said: "This sticks in the craw. It's right that DFID protects its staff, but this is robbing Peter to pay Paul."
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Friday, December 12, 2008

Lap tops computers and pda's history

History

Main article: History of laptops
The Epson HX-20

As the personal computer became feasible in the early 1970s, the idea of a portable personal computer followed; in particular, a "personal, portable information manipulator" was envisioned by Alan Kay at Xerox PARC in 1968[6] and described in his 1972 paper as the "Dynabook"[7].

The first commercially available portable computer appeared nine years later, in 1981. The Osborne 1 weighed 23.5 pounds (10.7 kg). It had no battery, a tiny 5" CRT screen and dual 5¼" single-density floppy drives. In the same year the first laptop-sized portable computer, the Epson HX-20, was announced[8]. The Epson had a LCD screen, a rechargeable battery and a calculator-size printer in a 1.6 kg (4 pounds) enclosure.

The first laptop using the clamshell design, utilized today by almost all laptops, appeared in 1982. The $8150 GRiD Compass 1100 was purchased by NASA and the military among others. The Gavilan SC, released in 1983, was the first notebook marketed using the term "laptop".

From 1983 onwards:

  • Several new input methods were introduced: the touchpad (Gavilan SC, 1983), the pointing stick (IBM ThinkPad 700, 1992) and handwriting recognition (Linus Write-Top[9], 1987).
  • CPUs became designed specifically for laptops (Intel i386SL, 1990), targeting low power consumption, and were augmented with dynamic power management features (Intel SpeedStep and AMD PowerNow!).
  • Displays reached VGA resolution by 1988 (Compaq SLT 286) and 256-color screens by 1993 (PowerBook 165c), progressing quickly to millions of colors and high resolutions.
  • High-capacity hard drives and optical storage (CD-ROM followed by DVD) became available in laptops soon after their introduction to the desktops.

Early laptops often had proprietary and incompatible architectures, operating systems and bundled applications.

[edit] Classification

The general terms "laptop" or "notebook" can be used to refer to a number of classes of small portable computers:[10][11]

By purpose and (approximately) by screen size:

  • Desktop replacement - emphasizes performance, is less portable, 17" and larger screen;
  • Standard laptop - balances portability and features, 13-15" screen;
  • Subnotebook - emphasizes portability, has less features, 13" or smaller screen.

By features:

  • Budget - a cheap, lower-performance standard-sized laptop;
  • Tablet PC - Has a touch-screen interface, may or may not have a keyboard;
  • Netbook - A cheaper, smaller version of a subnotebook designed mainly for Internet surfing and basic office applications.
  • Rugged - Engineered to operate in tough conditions (strong vibrations, extreme temperatures, wet and dusty environments).

[edit] As replacement

An Apple 17" MacBook Pro is often used as a desktop replacement.
Main article: Desktop replacement computer

A desktop replacement computer is a laptop that provides most of the capabilities of a desktop computer, with a similar level of performance. Desktop replacements are usually larger and heavier than standard laptops. They contain more powerful components and numerous ports, and have a 17" or larger display. Because of their bulk, they are not as portable as other laptops and their operation time on batteries is typically shorter.[11]

Some laptops in this class use a limited range of desktop components to provide better performance for the same price at the expense of battery life; in a few of those models, there is no battery at all, and the laptop can only be used when plugged in. These are sometimes called desknotes, a portmanteau of the words "desktop" and "notebook," though the term can also be applied to desktop replacement computers in general.[12]

The names "Media Center Laptops" and "Gaming Laptops" are also used to describe this class of notebooks.[10]

[edit] Subnotebook

Sony VAIO C1 subnotebook.
Main article: Subnotebook

A subnotebook, also called an ultraportable by some vendors, is a laptop designed and marketed with an emphasis on portability (small size, low weight and long battery life) that retains the performance of a standard notebook. Subnotebooks are usually smaller and lighter than standard laptops, weighing between 0.8 and 2 kg (2 to 5 pounds)[10]; the battery life can exceed 10 hours[13] when a large battery or an additional battery pack is installed.

To achieve the size and weight reductions, ultraportables use high resolution 13" and smaller screens (down to 6.4"), have relatively few ports, employ expensive components designed for minimal size and best power efficiency, and utilize advanced materials and construction methods. Some subnotebooks achieve a further portability improvement by omitting an optical/removable media drive; in this case they may be paired with a docking station that contains the drive and optionally more ports or an additional battery.

The term "subnotebook" is usually reserved to laptops that run general-purpose desktop operating systems such as Windows, Linux or Mac OS X, rather than specialized software such as Windows CE, Palm OS or Internet Tablet OS.

[edit] Netbook

An Asus Eee PC netbook.
Main article: Netbook

A netbook is a small laptop designed for portability and low price, with a performance inferior to that of a standard notebook yet adequate for surfing on the Internet and basic word processing. Netbooks use 10" and smaller screens, weigh 0.6 to 1.2 kg (1.5 to 3 pounds), and are generally powered by a CPU from one of the low-cost families with a high performance-to-power ratio such as Intel Atom, Celeron ULV, or VIA C7 processors.[14]

Netbooks use general-purpose operating systems such as Linux or Windows XP. Some models use small-capacity (4 to 40 Gb) SSD drives instead of the usual HDDs to save weight and battery power.

[edit] Rugged Laptop

Main article: Rugged computer
A Panasonic Toughbook.

A rugged (or ruggedized) laptop is designed to reliably operate in harsh usage conditions such as strong vibrations, extreme temperatures and wet or dusty environments. Rugged laptops are usually designed from scratch, rather than adapted from regular consumer laptop models. Rugged notebooks are bulkier, heavier, and much more expensive than regular laptops[15], and thus are seldom seen in regular consumer use.

The design features found in rugged laptops include rubber sheeting under the keyboard keys, sealed port and connector covers, passive cooling, superbright displays easily readable in daylight, cases and frames made of magnesium alloys or have a magnesium alloy rollcage[16] that are much stronger than plastic found in commercial laptops and solid-state storage devices or hard disc drives that are shock mounted to withstand constant vibrations. Rugged laptops are commonly used by public safety services (police, fire and medical emergency), military, utilities, field service technicians, construction, mining and oil drilling personnel. Rugged laptops are usually sold to organizations, rather than individuals, and are rarely marketed via retail channels.

[edit] Components

Main article: Computer hardware
Miniaturization: a comparison of a desktop computer motherboard (ATX form factor) to a motherboard from a 13" laptop (2008 unibody Macbook)

The basic components of laptops are similar in function to their desktop counterparts, but are miniaturized, adapted to mobile use, and designed for low power consumption. Because of the additional requirements, laptop components have worse performance than desktop parts of comparable price. Furthermore, the design bounds on power, size, and cooling of laptops limit the maximum performance of laptop parts compared to that of desktop components. [17]

The following list summarizes the differences and distinguishing features of laptop components in comparison to desktop personal computer parts:

  • Motherboard - laptop motherboards are highly make- and model-specific, and do not conform to a desktop form factor. Unlike a desktop board that usually has several slots for expansion cards (3 to 7 are common), a board for a small, highly integrated laptop may have no expansion slots at all, with all the functionality implemented on the motherboard itself; the only expansion possible in this case is via an external port such as USB. Other boards may have one or more standard or proprietary expansion slots. Several other functions (storage controllers, networking, sound card and external ports) are implemented on the motherboard.[18]
A SODIMM memory module.
  • Memory (RAM) - SO-DIMM memory modules that are usually found in laptops are about half the size of desktop DIMMs.[18] They may be accessible from the bottom of the laptop for ease of upgrading, or placed in locations not intended for user replacement such as between the keyboard and the motherboard.
  • Expansion cards - A PC Card (formerly PCMCIA) or ExpressCard bay for expansion cards is often present on laptops to allow adding and removing functionality, even when the laptop is powered on. Some subsystems (such as Wi-Fi or a cellular modem) can be implemented as replaceable internal expansion cards, usually accessible under an access cover on the bottom of the laptop. Two popular standards for such cards are MiniPCI and its successor, the PCI Express Mini. [21]
  • Power supply - laptops are powered by an internal rechargeable battery that is charged using an external power supply. The power supply can charge the battery and power the laptop simultaneously; when the battery is fully charged, the laptop continues to run on AC power. The charger adds about 400 grams (1 lb) to the overall "transport weight" of the notebook.
  • Battery - Current laptops utilize lithium ion batteries, with more recent models using the new lithium polymer technology. These two technologies have largely replaced the older nickel metal-hydride batteries. Typical battery life for standard laptops is two to five hours of light-duty use, but may drop to as little as one hour when doing power-intensive tasks. Batteries' performance gradually decreases with time, leading to an eventual replacement in one to five years, depending on the charging and discharging pattern. This large-capacity main battery should not be confused with the much smaller battery nearly all computers use to run the real-time clock and to store the BIOS configuration in the CMOS memory when the computer is off.
  • Video display controller - on standard laptops video controller is usually integrated into the chipset. This tends to limit the use of laptops for gaming and entertainment, two fields which have constantly escalating hardware demands[22]. Higher-end laptops and desktop replacements in particular often come with dedicated graphics processors on the motherboard or as an internal expansion card. These mobile graphics processors are comparable in performance to mainstream desktop graphic accelerator boards.[23]
  • Display - Most modern laptops feature 12 inch (30 cm) or larger color active matrix displays with resolutions of 1024×768 pixels and above. Many current models use screens with higher resolution than typical for desktop PCs (for example, the 1440×900 resolution of a 15" Macbook Pro[24] can be found on 19" widescreen desktop monitors).
A size comparison of 3.5" and 2.5" hard disk drives
  • Removable media drives - a DVD/CD reader/writer drive is standard. CD drives are becoming rare, while Blu-Ray is not yet common on notebooks[25]. Many ultraportables and netbooks either move the removable media drive into the docking station or exclude it altogether.
  • Internal storage - Hard disks are physically smaller—2.5 inch (60 mm) or 1.8 inch (46 mm) —compared to desktop 3.5 inch (90 mm) drives. Some new laptops (usually ultraportables) employ more expensive, but faster, lighter and power-efficient Flash memory-based SSDs instead. Currently, 160 to 250 Gb sizes are common for laptop hard disks (64 to 128 Gb for SSDs).
  • Input - A pointing stick, touchpad or both are used to control the position of the cursor on the screen, and an integrated keyboard is used for typing. External keyboard and mouse may be connected using USB or PS/2 (if present).

[edit] Docking stations

A docking station is a relatively bulky laptop accessory that contains multiple ports, expansion slots and bays for fixed or removable drives. A laptop connects and disconnects easily to a docking station, typically through a single large proprietary connector. A port replicator is a simplified docking station that only provides connections from the laptop to input/output ports. Both docking stations and port replicators are intended to be used at a permanent working place (a desk) to offer instant connection to multiple input/output devices and to extend a laptop's capabilities.

Docking stations became a common laptop accessory in the early 1990s. The most common use was in a corporate computing environment where the company had standardized on a common network card and this same card was placed into the docking station. These stations were very large and quite expensive. As the need for additional storage and expansion slots became less critical because of the high integration inside the laptop, the "port replicator" has gained popularity. The port replicator was a cheaper, often passive device that simply mated to the connectors on the back of the notebook and allowed the user to quickly connect his laptop so that his monitor, keyboard, printer and other devices were instantly attached. As higher speed ports such as USB and Firewire became common, the connection of a port replicator to a laptop was accomplished by a small cable connected to one of the USB or FireWire ports on the notebook. Wireless Port Replicators are available as well.

A recent variant of the port replicator is the combined power/display/USB hub cable found in the new Apple Cinema Display[26].

[edit] Standards

Some laptop components (optical drives, hard drives, memory and internal expansion cards) are relatively standardized, and it is possible to upgrade or replace them in many laptops as long as the new part is of the same type.[21] Subtle incompatibilities and variations in dimensions, however, are not uncommon.[27] Depending on the manufacturer and model, a laptop may range from having several standard, easily customizable and upgradeable parts to a proprietary design that can't be reconfigured at all.

In general, components other than the four categories listed above are not intended to be replaceable, and thus rarely follow a standard. In particular, motherboards, locations of ports, design and placement of internal components are usually make- and model-specific. Those parts are neither interchangeable with parts from other manufacturers nor upgradeable. If broken or damaged, they must be substituted with an exact replacement part. The users uneducated in the relevant fields are those the most affected by incompatibilities, especially if they attempt to connect their laptops with incompatible hardware or power adapters.

Intel, Asus, Compal, Quanta and other laptop manufacturers have created the Common Building Block standard for laptop parts to address some of the inefficiencies caused by the lack of standards.

[edit] Advantages

Laptop computers are portable and can be used in many locations (Former Mexican President, Vicente Fox).

Portability is usually the first feature mentioned in any comparison of laptops versus desktop PCs[28]. Portability means that a laptop can be used in many places - not only at home and at the office, but also during commuting and flights, in coffee shops, in lecture halls and libraries, at clients' location or at a meeting room, etc. The portability feature offers several distinct advantages:

  • Getting more done - using a laptop in places where a desktop PC can't be used, and at times that would otherwise be wasted. For example, an office worker tackling his e-mails during a hour-long commute by train, or a student doing her homework at the university coffee shop during a break between lectures.[29]
  • Immediacy - Carrying a laptop means having instant access to various information, personal and work files. Immediacy allows better collaboration between coworkers or students, as a laptop can be flipped open to present a problem or a solution anytime, anywhere.
  • Up-to-date information - If a person has more than one desktop PC, a problem of synchronization arises: changed made on one computer are not automatically propagated to the others. There are ways to resolve this problem, including physical transfer of updated files (using a USB stick or CDs) or using synchronization software over the Internet. However, using a single laptop at both locations avoids the problem entirely, as the files exist in a single location and are always up-to-date.
  • Connectivity - A proliferation of Wi-Fi wireless networks and cellular broadband data services (HSDPA, EVDO and others) combined with a near-ubiquitous support by laptops [30] means that a laptop can have easy Internet and local network connectivity while remaining mobile. Wi-Fi networks and laptop programs are especially widespread at university campuses.[31]

Other advantages of laptops include:

  • Size - laptops are smaller than standard PCs. This is beneficial when space is at a premium, for example in small apartments and student dorms. When not in use, a laptop can be closed and put away.
  • Low power consumption - laptops are several times more power-efficient than desktops. A typical laptop uses 20-90 W, compared to 100-800 W for desktops. This could be particularly beneficial for businesses (which run hundreds of personal computers, multiplying the potential savings) and homes where there is a computer running 24/7 (such as a home media server, print server, etc.)
  • Quiet - laptops are often quieter than desktops, due both to better components (quieter, slower 2.5-inch hard drives) and to less heat production leading to use of fewer and slower cooling fans.
  • Battery - a charged laptop can run several hours in case of a power outage and is not affected by short power interruptions and brownouts. A desktop PC needs a UPS to handle short interruptions, brownouts and spikes; achieving on-battery time of more than 20-30 minutes for a desktop PC requires a large and expensive UPS.[32]

[edit] Disadvantages

Compared to desktop PCs, laptops have disadvantages in the following fields:

[edit] Performance

While the performance of mainstream desktops and laptops is comparable, laptops are significantly more expensive than desktop PCs at the same performance level.[33] The upper limits of performance of laptops are lower, and "bleeding-edge" features usually appear first in desktops and only then, as the underlying technology matures, are adapted to laptops.

However, for Internet browsing and typical office applications, where the computer spends the majority of its time waiting for the next user input, even netbook-class laptops are generally fast enough.[34] Standard laptops are sufficiently powerful for high-resolution movie playback and light gaming. 3D gaming, video editing and encoding, and number-crunching software (databases, math, engineering, financial, etc.) are the areas where the laptops are at the biggest disadvantage.

[edit] Upgradeability

Upgradeability of laptops is very limited compared to desktops, which are thoroughly standardized. In general, hard drives and memory can be upgraded easily. Optical drives and internal expansion cards may be upgraded if they follow an industry standard, and all other internal components, including the CPU and graphics, are not intended to be upgradeable.

The reasons for limited upgradeability are both technical and economic. There is no industry-wide standard form factor for laptops; each major laptop manufacturer pursues its own proprietary design and construction, with the result that laptops are difficult to upgrade and have high repair costs. With few exceptions, laptop components can rarely be swapped between laptops of competing manufacturers, or even between laptops from the different product-lines of the same manufacturer.

Some upgrades can be performed by adding external devices, either USB or in expansion card format such a PC Card: sound cards, network adapters, hard and optical drives, and numerous other peripherals are available. But those upgrades usually impair the laptop's portability, because they add cables and boxes to the setup and often have to be disconnected and reconnected when the laptop is moved.

[edit] Ergonomics and health

Laptop coaster preventing heating of lap and improving laptop airflow.

Because of their small and flat keyboard and trackpad pointing devices, prolonged use of laptops can cause RSI.[35] Usage of ergonomic keyboards and pointing devices is recommended to prevent injury when working for long periods of time; they can be connected to a laptop easily by USB or via a docking station. Some health standards require ergonomic keyboards at workplaces.

The integrated screen often causes users to hunch over for a better view, which can cause neck or spinal injuries. A larger and higher-quality external screen can be connected to almost any laptop to alleviate that and to provide additional "screen estate" for more productive work.

A study by State University of New York researchers found that heat generated from laptops can raise the temperature of the scrotum, potentially putting sperm count at risk. The small study, which included little more than two dozen men aged 13 to 35, found that the sitting position required to balance a laptop can raise scrotum temperature by as much as 2.1 °C (3.8 °F). Heat from the laptop itself can raise the temperature by another 0.7 °C (1.4 °F), bringing the potential total increase to 2.8 °C (5.2 °F). However, further research is needed to determine whether this directly affects sterility in men.[36] A common practical solution to this problem is to place the laptop on a table or desk.

Heat from using a laptop on the lap can also cause skin discoloration on the thighs.[37]

[edit] Durability

A clogged heatsink on a 2.5 year old laptop.

Due to their portability, laptops are subject to more wear and physical damage than desktops. Components such as screen hinges, latches, power jacks[38] and power cords deteriorate gradually due to ordinary use. A liquid spill onto the keyboard, a rather minor mishap with a desktop system, can damage the internals of a laptop and result in a costly repair. One study found that a laptop is 3 times more likely to break during the first year of use than a desktop.[39]

Original external components are expensive (a replacement AC adapter, for example, could cost $75); other parts are inexpensive - a power jack can cost a few dollars - but their replacement may require extensive disassembly and reassembly of the laptop by a technician. Other inexpensive but fragile parts often cannot be purchased separate from larger more expensive components.[40] The repair costs of a failed motherboard or LCD panel may exceed the value of a used laptop.

Laptops rely on extremely compact cooling systems involving a fan and heat sink that can fail due to eventual clogging by accumulated airborne dust and debris. Most laptops do not have any sort of removable dust collection filter over the air intake for these cooling systems, resulting in a system that gradually runs hotter and louder as the years pass. Eventually the laptop starts to overheat even at idle load levels. This dust is usually stuck inside where casual cleaning and vacuuming cannot remove it. Instead, a complete disassembly is needed to clean the laptop.

Battery life of laptops is limited; the capacity drops with time, necessitating an eventual replacement after a few years.

[edit] Security

Being expensive, common and portable, laptops are prized targets for theft. The cost of the stolen business or personal data and of the resulting problems (identity theft, credit card fraud, breach of privacy laws) can be many times the value of the stolen laptop itself. Therefore, both physical protection of laptops and the safeguarding of data contained on them are of the highest importance.

Most laptops have a Kensington security slot which is used to tether the computer to a desk or other immovable object with a security cable and lock. In addition to this, modern operating systems and third-party software offer disk encryption functionality that renders the data on the laptop's hard drive unreadable without a key or a passphrase.

[edit] Other portable computing devices

There are several categories of portable computing devices that can run on batteries but are not usually classified as laptops: portable computers, keyboardless tablet PCs, Internet tablets, PDAs, handheld computers (UMPCs) and smartphones.

The Compaq Portable
A keyboard-less tablet PC
A Palm TX PDA
A Nokia N800 Internet tablet
An OQO handheld computer
An Apple iPhone smartphone

A Portable computer is a general-purpose computer that can be easily moved from place to place, but cannot be used while in transit, usually because it requires some "setting-up" and an AC power source. The most famous example is the Osborne 1. Also called a "transportable" or a "luggable" PC.

A Tablet PC that lacks a keyboard (also known as a non-convertible Tablet PC) is shaped like slate or a paper notebook, features a touchscreen with a stylus and handwriting recognition software. Tablets may not be best suited for applications requiring a physical keyboard for typing, but are otherwise capable of carrying out most tasks that an ordinary laptop would be able to perform.

An Internet tablet is an Internet appliance in tablet form. Unlike a Tablet PC, an Internet tablet does not have much computing power and its applications suite is limited - it can not replace a general purpose computer. Internet tablets typically feature an MP3 and video player, a web browser, a chat application and a picture viewer.

A Personal digital assistant (PDA) is a small, usually pocket-sized, computer with limited functionality. It is intended to supplement and to synchronize with a desktop computer, giving access to contacts, address book, notes, e-mail and other features.

A Handheld computer, also known as an Ultra Mobile PC (UMPC) is a full-featured, PDA-sized computer running a general-purpose operating system.

A Smart phone is a PDA with an integrated cellphone functionality. Current smartphones have a wide range of features and installable applications.

Boundaries that separate these categories are blurry at times. For example, the OQO UMPC is also a PDA-sized tablet PC; the Apple eMate had the clamshell form factor of a laptop, but ran PDA software. The HP Omnibook line of laptops included some devices small enough to be called handheld computers. The hardware of the Nokia 770 internet tablet is essentially the same as that of a PDA such as the Zaurus 6000; the only reason it's not called a PDA is that it doesn't have PIM software. On the other hand, both the 770 and the Zaurus can run some desktop Linux software, usually with modifications.

[edit] Major brands and manufacturers

Main article: List of laptop brands and manufacturers

There is a multitude of laptop brands and manufacturers; several major brands, offering notebooks in various classes, are listed in the box to the right.

The major brands usually offer good service and support, including well-executed documentation and driver downloads that will remain available for many years after a particular laptop model is no longer produced. Capitalizing on service, support and brand image, laptops from major brands are more expensive than laptops by smaller brands and ODMs.

Some brands are specializing in a particular class of laptops, such as gaming laptops (Alienware), netbooks (EeePC) and laptops for children (OLPC).

Many brands, including the major ones, do not design and do not manufacture their laptops. Instead, a small number of Original Design Manufacturers (ODMs) design new models of laptops, and the brands choose the models to be included in their lineup. In 2006, 7 major ODMs manufactured 7 of every 10 laptops in the world, with the largest one (Quanta Computer) having 30% world market share.[41] Therefore, there often are identical models available both from a major label and from a low-profile ODM in-house brand.
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X box

The Xbox was Microsoft's first product that ventured into the video game console market, after having collaborated with Sega in porting Windows CE to the Dreamcast console. Notable launch titles for the console included Amped: Freestyle Snowboarding, Dead or Alive 3, Halo: Combat Evolved, Oddworld: Munch's Oddysee, and Project Gotham Racing.

[edit] Development

The Xbox 1st edition was initially developed within Microsoft by a small team, that included game developer Seamus Blackley. Microsoft repeatedly delayed the console, which was revealed at the end of 1999 following interviews of then-Microsoft CEO Bill Gates. Gates stated that a gaming/multimedia device was essential for multimedia convergence in the new times, confirmed by Microsoft with a press release. [4]

According to the book Smartbomb, by Heather Chaplin and Aaron Ruby, the remarkable success of the upstart Sony PlayStation worried Microsoft in late 1990s. The growing video game market seemed to threaten the PC market which Microsoft had dominated and relied upon for most of its revenues. Additionally, a venture into the gaming console market would diversify Microsoft's product line, which up to that time had been heavily concentrated on software.

According to Dean Takahashi's book, Opening the Xbox, the Xbox was originally to be named "DirectX-box", to show the extensive use of DirectX within the console's technology.[5] "Xbox" was the final name decided by marketing, but the console still retains some hints towards DirectX, most notably the "X"-shaped logo, which DirectX is famous for, along with the "X" shape on the top of the system.

As the console approached launch, Microsoft's J Allard was responsible for the hardware and system software development, Ed Fries was responsible for game development on the platform, and Mitch Koch was responsible for sales and marketing; all three reported to Robbie Bach. This team was also primarily responsible for Microsoft's follow-up product, the Xbox 360.

[edit] Price history

Country Release date
Europe March 14, 2002
Finland March 14, 2002
United Kingdom March 14, 2002
North America November 15, 2001
Australia March 14, 2002
New Zealand October 3, 2002
Japan February 2, 2002
Mexico October 17, 2002

With an expensive PlayStation 2 (PS2) and the moderately priced but seemingly family entertainment focused GameCube as competition, many gamers were eager to invest in the console. The Xbox initially sold very well. All three platform-holders had difficulty manufacturing and selling the systems profitably.

By September 15, 2005, Microsoft reported a four billion dollar loss in selling the Xbox gaming system.[6]

[edit] Xbox 360

Main articles: Xbox 360 and List of Xbox games compatible with Xbox 360

NVIDIA ceased production of the Xbox's GPU in August 2005, which marked the end of Xbox production and the quick release of the Xbox 360 on November 22, 2005.

When equipped with a removable hard drive add-on, the Xbox 360 supports a limited number of the Xbox's game library through emulation. Emulation adds support for anti-aliasing as well as upscaling of the still standard definition image. These emulators are periodically updated to add compatibility for older games and are available for free through Xbox Live or as a file download to be burned to a CD/DVD from the Xbox web site. These updates are also available monthly as part of the demo disc that comes with each issue of Official Xbox Magazine. As the architectures are entirely different between Xbox and Xbox 360, software emulation is the only viable option for compatibility without including processors from the original Xbox.

[edit] Hardware and accessories

[edit] Hardware

See also: Xbox special limited editions
Xbox drives

The Xbox was the first console to incorporate a hard disk drive, used primarily for storing game saves compressed in ZIP archives and content downloaded from Xbox Live. This eliminated the need for separate memory cards (although some older consoles, such as the TurboGrafx-CD, Sega CD and Sega Saturn had featured built-in battery backup memory prior to 2007). An Xbox user could rip music from standard audio CDs to the hard drive, and these songs were used for the custom soundtracks in some games.[7]

The Xbox was the first product in the gaming industry to feature Dolby Interactive Content-Encoding Technology, which allows real-time Dolby Digital encoding in game consoles. Previous game consoles could only utilize Dolby Digital 5.1 during non-interactive "cut scene" playback.[8]

The Xbox is based on commodity PC hardware and runs a custom operating system which exposes APIs based largely on DirectX 8.1; the API commonality led to a common confusion that the OS was a stripped-down version of the Windows 2000 kernel.[9]

The Xbox itself is much larger and heavier than its contemporaries. This is largely due to a bulky tray-loading DVD-ROM drive and the standard-size 3.5 inch hard drive. However, the Xbox has also pioneered safety features, such as breakaway cables for the controllers to prevent the console from being pulled from the surface on which it resides.

The original game controller design, which was particularly large, was similarly often criticized since it was ill-suited to those with small hands and caused cramping in the hands of some users. In response to these criticisms, a smaller controller was introduced for the Japanese Xbox launch. This Japanese controller (which was briefly imported by even mainstream video game store chains such as GameStop) was subsequently released in other markets as the "Xbox Controller S". In addition, all future Xbox consoles were shipped with a "Controller S", while the original controller (known as Controller "0" or "The Duke") was discontinued.[10]

Several internal hardware revisions have been made in an ongoing battle to discourage modding (hackers continually updated modchip designs in an attempt to defeat them), to cut manufacturing costs, and to provide a more reliable DVD-ROM drive (some of the early units' drives gave Disc Reading Errors due to the unreliable Thomson DVD-ROM drives used). Later generations of Xbox units that used the Thomson TGM-600 DVD-ROM drives and the Philips VAD6011 DVD-ROM drives were still vulnerable to failure that rendered the consoles either unable to read newer discs or caused them to halt the console with an error code usually indicating a PIO/DMA identification failure, respectively. These units would not be covered under the extended warranty.

In 2002, Microsoft and NVIDIA entered arbitration over a dispute on the pricing of NVIDIA's chips for the Xbox.[11] NVIDIA's filing with the SEC indicated that Microsoft was seeking a US$13 million discount on shipments for NVIDIA's fiscal year 2002. Additionally, Microsoft alleged violations of the agreement the two companies entered, sought reduced chipset pricing, and sought to ensure that NVIDIA fulfill Microsoft's chipset orders without limits on quantity. The matter was settled on February 6, 2003, and no terms of the settlement were released.[12]

Launch-era Xbox gaming units were manufactured in Hungary, while the controllers were manufactured primarily in Indonesia.

[edit] Technical specifications

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[edit] Official accessories

[edit] Audio/video connectors

  • Standard AV cable: Provides composite video and monaural or stereo audio to TVs equipped with RCA inputs. Comes with the system. European systems come with an RCA jack to SCART converter block in addition to the cable.
  • RF Adapter: Provides a combined audio and video signal on an RF connector.
  • Advanced AV Pack: Provides S-Video and TOSLINK audio in addition to the RCA composite video and stereo audio of the Standard AV Cable.
  • High Definition AV Pack: Intended for HDTVs, it provides a YPrPb component video signal over three RCA connectors. Also provides analog RCA and digital TOSLINK audio outputs.
  • Advanced SCART cable: The European equivalent to the Advanced AV Pack, providing a full RGB video SCART connection in place of S-Video, RCA composite and stereo audio connections (composite video and stereo are still provided by the cable, through the SCART connector, in addition to the RGB signal), while retaining the TOSLINK audio connector. As Europe had no HDTV standard when the Xbox was released, no high definition cable was provided in those markets.

Numerous unofficial third-party cables and breakout boxes exist that provide combinations of outputs not found in these official video packages; however, with the exception of a few component-to-VGA converters and custom-built VGA boxes, the four official video packages represent all of the Xbox's possible outputs. This output selectivity is made possible by the Xbox's SCART-like AVIP port.

[edit] Networking

  • Ethernet (Xbox Live) cable: An Ethernet cable with RJ-45 connection for connecting the Xbox to a broadband modem or router. The Xbox also can connect to Xbox LIVE.
  • Xbox Wireless Adapter: a wireless bridge which converts data running through an Ethernet cable to a wireless (802.11b or 802.11g) signal to connect to a wireless LAN. While the official Wireless Adapter guarantees compatibility with the Xbox, almost any wireless bridge can be used.
  • Xbox Live Starter Kit: A subscription and installation pack for the Xbox Live service, as well as a headset (with monaural earpiece and microphone) that connects to a control box that plugs into the top expansion slot of a controller. The headset can in fact be replaced with most standard earpiece-and-microphone headsets; headset specialist Plantronics produces various officially licensed headsets, including a special-edition headset for Halo 2.
  • System Link cable: A Cat 5 Ethernet crossover cable for connecting together two consoles or a Cat 5 straight through cable used in conjunction with an Ethernet hub for connecting up to four consoles, for up to 16 total players. This functionality is similar to Sega's DirectLink for Sega Saturn.

[edit] Multimedia

  • DVD Playback Kit: Required in order to play DVD movies, the kit includes an infrared remote control and receiver. DVD playback was not included as a standard feature of the Xbox due to licensing issues with the DVD format that would have added extra cost to the console's base price. By selling a DVD remote separately, Microsoft was able to bundle the cost of the DVD licensing fee with it. Although there is nothing to prevent the Xbox from acting as a progressive scan DVD player, Microsoft chose not to enable this feature in the Xbox DVD kit in order to avoid royalty payments to the patent-holder of progressive scan DVD playback. The DVD Playback kit only plays DVDs from the local region. The DVD Playback kit will also allow the Xbox to play VCD movies. By default, the Xbox can only play Xbox games and audio CDs.
  • Xbox Music Mixer: A utility software bundled with a microphone that connects to an adapter that plugs into the top expansion slot of a controller. It provides a music player with 2D/3D visualizations as well as basic karaoke functions. It also allows users to transfer pictures in JPEG format (to create slide shows) as well as audio in MP3 or WMA format (for karaoke or a custom game soundtrack) from a Windows XP or Windows Vista machine running the Xbox Music Mixer PC Tool.

[edit] Controllers and removable storage

The original Duke controller (left) and the Controller S (right).

The Xbox controller features two analog sticks, a directional pad, two analog triggers, a Back button, a Start button, two accessory slots and six 8-bit analog action buttons (A/Green, B/Red, X/Blue, Y/Yellow, Black and White).[14]

The standard Xbox controller (also known as the "Duke" controller) was originally the Xbox controller for all territories except Japan. The Duke controller has been criticized for being relatively large and bulky compared to other video game controllers (it was awarded "Blunder of the Year" by Game Informer in 2001[15] and a Guinness World Record for the biggest controller in Guinness World Records Gamer's Edition 2008). The black and white buttons are located above the A, B, X, and Y buttons, and the Back/Start buttons are located between and below the d-pad and right analog stick.

The Controller S, a smaller, lighter Xbox controller was originally the standard Xbox controller only in Japan (codenamed "Akebono").[16] It was designed to be more comfortable for those with smaller hands.[17][18] The controller S was released in other territories by popular demand, and eventually replaced the standard controller in the Xbox's retail package, with the larger original controller available as an accessory. The white and black buttons are located below the A, B, X, and Y buttons, and the Back/Start buttons are similarly placed below the left analog stick. This controller has received its share of criticism as well, especially with regards to placement of the black/white and back/start buttons.[19]

An 8 MB removable solid state memory card can be plugged into the controllers, onto which game saves can either be copied from the hard drive when in the Xbox dashboard's memory manager or saved during a game. Most Xbox games can be copied to the memory unit and to another console but some Xbox saves are digitally signed, each console has a unique signing key, and some games (e.g., Ninja Gaiden and Dead or Alive Xtreme Beach Volleyball) will not load saved games signed by a different Xbox, limiting the utility of the memory card. Additionally, game saves can be tagged as uncopyable, or simply padded to over 8 MB (Star Wars: Knights of the Old Republic). The signing mechanism has been reverse-engineered by the Xbox hacking community, who have developed tools to modify savegames to work in a different console, though the signing key of the recipient Xbox (the 'HDkey'), and the ramped-up title key of the game (the 'authkey'), must be known. It is also possible to save an Xbox Live account on a memory unit, to simplify its use on more than one Xbox.

[edit] Games

Main articles: List of Xbox launch titles and List of Xbox games

The Xbox launched in North America on November 15, 2001. The greatest success of the Xbox's launch titles was Halo: Combat Evolved which was well received by critics.[20] Its sequel, Halo 2, is the best-selling first-generation Xbox game worldwide.[3] Other successful launch titles included NFL Fever 2002,[21] Project Gotham Racing,[22] and Dead or Alive 3;[23] however, the failure of several first-party games (including Azurik: Rise of Perathia)[24] damaged the initial public reputation of the Xbox.

Although the console enjoyed strong third party support from its inception, many early Xbox games did not take full advantage of its powerful hardware, with few additional features or graphical improvements to distinguish them from the PS2 version, thus negating one of the Xbox's main selling points. Additionally, Sony countered the Xbox for a short time by temporarily securing PlayStation 2 exclusives for highly anticipated games such as the Grand Theft Auto series and Metal Gear Solid 2: Sons of Liberty (although they were later ported to the Xbox and are no longer exclusive).

In 2002 and 2003, several releases helped the Xbox to gain momentum and distinguish itself from the PS2. The Xbox Live online service was launched in late 2002 alongside pilot titles MotoGP, MechAssault and Tom Clancy's Ghost Recon. Several best-selling and critically acclaimed titles for the Xbox were published, such as Tom Clancy's Splinter Cell, Ninja Gaiden and LucasArts' Star Wars: Knights of the Old Republic. Take-Two Interactive's exclusivity deal with Sony was amended to allow Grand Theft Auto III and its sequels to be published on the Xbox. In addition, many other publishers got into the trend of releasing the Xbox version alongside the PS2 version, instead of delaying it for months.

In 2004, Halo 2 set records as the highest-grossing release in entertainment history making over $125 million in its first day,[25] as well as being a successful killer app for the online service. That year, Microsoft and Electronic Arts reached a deal that would see the latter's popular titles enabled on Xbox Live.

[edit] Xbox Live

Xbox Live logo
Main article: Xbox Live

On November 15, 2002, Microsoft launched its Xbox Live online gaming service, allowing subscribers to play online Xbox games with (or against) other subscribers all around the world and download new content for their games to the system's hard drive. This online service works exclusively with a broadband Internet connection. Approximately 250,000 subscribers had signed up within two months of Xbox Live's launch.[26] In July 2004, Microsoft announced that Xbox Live had reached one million subscribers, and a year later, in July 2005, that membership had reached two million.

[edit] Xbox modding

Xbox motherboard with installed modchip.

The popularity of the Xbox, as well as its relatively short 90 day warranty, inspired efforts to circumvent the built-in hardware and software security mechanisms, a practice informally known as modding. Within a few months of its release the Xbox BIOS was dumped and hacked by MIT student Andrew Huang so that it would skip digital signature checks and media flags, allowing unsigned code, Xbox game backups, etc., to be run. This was possible due to flaws in the Xbox's security.[27][unreliable source?] Modding an Xbox in any manner will void its warranty, as it may require disassembly of the console. Having a modified Xbox will also disallow it from accessing Xbox Live as it contravenes the Xbox Live Terms of Use,[28] however most modchips can be disabled, allowing the Xbox to boot in a "stock" configuration, softmods can be disabled by "coldbooting" a game (having the game in the DVD drive before turning the console on, so the softmod is not loaded) or by using a multiboot configuration.

Four main methods exist of modding the Xbox :

  • Modchip: Installing a modchip inside the Xbox that bypasses the original BIOS, with a hacked BIOS to circumvent the security mechanisms.[29]
  • TSOP flashing: Re-flashing the onboard BIOS chip with a hacked BIOS to circumvent the security mechanisms. The Xbox BIOS is contained on a commodity EEPROM (the 'TSOP'), which can be made writable by the Xbox by bridging points on the motherboard.[30] Flashing is usually carried out by using a specially crafted gamesave (see 'Game save exploit', below) to flash the onboard TSOP, but the TSOP can also be de-soldered and re-written in a standard EEPROM programmer. This method only works on 1.0 to 1.5 Xboxes, as later versions replace the commodity TSOP with an LPC ROM contained within a proprietary chip.[31]
  • Softmods: Installing additional software files to the Xbox hard drive, which exploit programming errors in the Dashboard to gain control of the system, and overwrite the in-memory copy of the BIOS.[32] Soft modification is known to be safe for Xbox Live if the user enables multibooting with the Microsoft dashboard and an original game disc is used.[33]
    • Game save exploit: Using select official game releases to load game saves that exploit buffer overflows in the save game handling.[34] When these special game saves are loaded, they access an interface with scripts for installing the necessary softmod files. Disassembly of the Xbox is not required when installing most game save exploits.
    • Hot swap: Using a computer to change the data on the hard drive. This requires having the Xbox unlock the hard drive when it is turned on, then swapping the powered hard drive into a running computer. By using a Linux-based Live CD, data on the hard drive can be read, altered, and deleted. In most cases, an automated script will automatically install the softmod files directly to the Xbox hard drive. This technique has been used extensively to harbor cheating on many online games. Disassembly of the console is required to perform a hot swap.

[edit] Operating Systems

Beyond gaming, a modded Xbox can be used as a media center with the Xbox Media Center.[35]

There are also distributions of Linux developed specifically for the Xbox, including those based on Gentoo, Debian (see also Xebian), Damn Small Linux, and Dyne:bolic.

Alternative operating systems:

One advantage over a regular, unmodded Xbox, is the ability to use a trainer.

[edit] UK advertising controversy

In 2002 the Independent Television Commission (ITC) banned a television advertisement for the Xbox in the United Kingdom after responses from certain members of the public deemed it distasteful. It depicted a mother giving birth to a boy who is fired like a projectile through the hospital window and ages rapidly as he flies through the air screaming, before crashing into his own grave. The advertisement ended with the slogan Life is short. Play more.[39]

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