Cheap Laptop
A laptop computer or simply laptop (also notebook or laptop) is a small mobile computer, typically weighing from one to three kilograms, depending on size, materials, and other factors.
Although the term "laptop" and "portable" are synonymous often used "laptop" is the longest term, SC introduced in 1983 with the Gavilan. "Notebook" is a currency later that was used to differentiate smallDevices such as Compaq LTE series in 1989, which were, in contrast to previous laptops, the approximate size of an A4 sheet. [1] Either term is often used incorrectly: Because of the heat and other issues, many laptops for use on knees are inappropriate, and most are not the size of an A4 sheet of paper. Although some laptops more like the Macintosh Portable and certain models of Zenith Turbo SPort was sometimes described as "laptops", was their size and the weight is too largethis category.
Laptops usually on even a single battery or AC / DC adapter that the enrichment while powering the computer.
An Acer laptop with touchpad PCs, laptops are capable of the same tasks as a desktop PC, although they usually stay the same for less. They contain components that are similar to their colleagues in the office and perform the same functions but are miniaturized andoptimized for mobile use and efficient power consumption. Laptops usually have liquid crystal displays and most use RAM modules for different (eg, SO-DIMM instead of the larger DIMMs). In addition to a built-in keyboard, they can use a touchpad (also known as a trackpad) or a pointing stick for input, if an external keyboard or mouse can be achieved in the rule.
Categories
Sometimes laptops are used to sub-typesinclude
Ultra Portable
Laptops with screens typically less than 12 inches diagonally and weighing less than 1.7 kg. Their target group are business travelers, who typically require small, lightweight laptops. Ultra Portables are often very expensive processors from the house and save energy and almost always have integrated graphics.
Thin-and-fire
Laptops usually with a weight of 1.8 kg and 2.8 kg with a screen size between 12 to 14 inches in diagonal.
Medium-Laptops
These screens are usually 15 kg up to 15.4 and a weight of about 3 to 3.5. In general, they sacrifice a little computing power small size and greater autonomy, although the length and width are usually determined by the size of the screen.
Replace desktops
high-performance notebooks for use primarily in a fixed location, and only rarely performed because of its size and weight, it offers more space for powerful componentsand a large screen, usually 15 inches or more. Desktop replacement rather limited autonomy, have seldom more than three hours because the devices do not optimize the energy efficiency.
History
Before / Laptop were technically feasible, similar ideas have been proposed, including Alan Kay Dynabook concept, developed at Xerox PARC in 1970 in the early.
The first notebook available in the trade was the Osborne 11981, uses the CP / M operating system. Although it was bulky and heavy for the laptop today, with a small CRT monitor, it was a revolutionary impact on the short-to companies, professionals were able to take their computer and data with them for the first time and this other "luggables" were inspired by what was probably the first portable computer, the NoteTaker again developed at Xerox PARC in 1976 ten prototypes were built only Xerox. The Osborne was aboutcan be done on the size of a portable sewing machine, and, above all, on a commercial airliner. However, it was not possible, the Osborne are powered by batteries, it should be plugged
Enduring success is its platform-week, the majority of Compaq, the first product of Compaq in 1983, when the IBM Personal Computer has become the standard. Although a bit more to operate as a portable Osborne machines, and require AC power, it ran MS-DOS and was the firsttrue clone IBM (IBM's own later Portable Computer, which came in 1984, was much less than the IBM-compatible PC [Compaq edit]).
Another significant machine announced in 1981, although preliminary, were widely sold in 1983, was the Epson HX-20. A simple handheld computer, it featured a full keyboard key transit country 68 rechargeable nickel-cadmium batteries, a small (120 32 pixels) matrix LCD display with 4 lines of text, 20 characters per line text mode, a 24 column dot dotDot-matrix printer, a Microsoft BASIC interpreter, and 16 KB RAM (expandable to 32K).
But the first true laptop was probably the GRID Compass 1101, 1979-1980 designed by Bill Moggridge in and published in 1982. Enclosed in a magnesium case, it introduced the now familiar clamshell design, in which the screen folded flat against the keyboard off. The computer can be run from the batteries and has a screen with 320 × 200 pixels plasma and 384 kilobytesBubble memory. It was not IBM compatible, and its high price ($ 10,000), it is limited to specific applications. However, it has been widely used by the U.S. Army and used by NASA on the Space Shuttle during the 1980s. Manufacturer grid then earned a return on its patent rights as its innovations became commonplace. Grid Systems Corp. was later confirmed by Tandy (Radio Shack bought).
Two more cell phones have been remarkable early Sharp PC-5000 and the Gavilan SC, announced in1983, but the first sale in 1984. The Gavilan was the first computer to perform a particular laptop will be marketed as before. Il a été également équipe d'un touchpad-Napier comme dispositif Spot welding, install sur un panneau au-dessus du clavier. Because the compass grid, the Gavilan and Sharp were housed in clamshell cases, but they were partly IBM-compatible, but also to manage their own system software. Both had LCD displays, and can connect to printers, external option.
The year 1983 alsowas the start of what was probably the best-selling early laptop, the Kyocera Kyotronic 85 which has a lot to thank the design of the previous Epson HX-20. Although it originally was a shop keeper in Japan, it was quickly from Tandy Corporation, Olivetti, and NEC, which saw its potential and marketed or TRS-80 Model 100 line (or Tandy 100), Olivetti M licensed -10, NEC PC- 8,201th [2] The machines ran on standard AA batteries. The Tandy integrated programs, including a BASICInterpreter, a text editor and a terminal program, were supplied by Microsoft and is believed to have been written even in part by Bill Gates. The computer is not a typo, but so far as a 40 x 8 character LCD tilt a full keyboard travel display. With its internal modem, it was an ultra-portable communication terminal. Thanks to its portability, good battery life (and easier replacement), reliability (it had no moving parts) and the low price (as little as $ 300 U.S.)Model was very popular, a favorite among journalists. He weighed less than 2 kg with dimensions of 30 × 21.5 × 4.5 cm (12 × 8.5 × 1.75 inches). First specifications, 8 kilobytes of RAM (expandable to 24 KB) and a 3-MHz processor. The machine was in fact the size of a notebook paper, but the concept was not still use computers and are usually described as "portable".
Among the first commercial IBM-compatible laptopsIBM PC Convertible, launched in 1986, and two Toshiba models, the T1000 and T1200, introduced in 1987. Although limited floppy-based DOS machines, the operating system in read-only memory, the Toshiba models were small and light enough to carry in a backpack, and could be operated with batteries, lead acid. They also introduced the now standard "Resume" feature to DOS-based machines: the computer could be interrupted meetings between the without any restartTime.
The first laptops successful on a large scale came in large part through a Request for Proposal (RFP) for the U.S. Air Force in 1987. This treaty would result in the purchase of more than 200,000 laptops. Competition to supply this contract was fiercely contested and the major PC manufacturers at the time, IBM, Toshiba, Compaq, NEC and Zenith Data Systems plunged (ZDS) to try to win laptop computers and developing case. ZDS, which had already won a landmark agreement with the IRS'sZ-171, was awarded the contract for the Supersport series. The Supersport series is an Intel 8086, two floppy drives, a backlit, blue and white STN LCD screen starts, and a NiCd battery. Later models containing an Intel 80286 and a hard disk of 20 megabytes. On the basis of this agreement was ZDS global supplier of notebooks in 1987 and 1988.
ZDS with Tottori Sanyo partnership in the design and production of the laptops. ThisRelationship is noteworthy because it is the first agreement between a major brand and an Asian OEM (Original Equipment Manufacturer) was. At the time, Compaq, IBM, Toshiba, NEC, etc. designed and manufactured their own machines. But after the success of the ZDS with other relationships, like Compaq and citizens, soon followed. At that time, the quality of Japanese engineering and manufacturing in conjunction with the strength of the dollar against the yen (typically about 130 Yen = $ 1)led most brands of suppliers in Japan. Companies such as Sanyo, Tottori Sanyo, Citizen, Casio, and were all very involved in this case means that OEMs. But by the mid-1990s a weakening dollar and rising profitability of Taiwanese OEMs such as Acer, Quanta, Compal, Twinhead, and Chicony lead the supply base rapidly shift from Japan to Taiwan. In addition began brands that are more nimble and less on internal engineering such as Gateway, Dell and Micron claiming to rise rapidlyManagement positions. Combinations such as Dell / Compal and Gateway / Quanta eventually became Central partnerships and significantly contributed to the importance of Taiwanese manufacturers as the center of PC manufacturing from about 1995th
Another notable computer was the Cambridge Z88, designed in 1988 by Clive Sinclair, introduced in. About the size of a sheet of A4 paper, and it ran on standard batteries and contain basic spreadsheet, word processing and communicationPrograms. It expects the future miniaturization of notebooks and as a ROM-based machine with a small display, can - like the TRS-80 Model 100 - also as a precursor des PDA
In the late 1980s, laptops are increasingly popular among business people. The NEC ULTRALITE, 1989 published in the middle, was perhaps the first laptop compartment, a weight of just over 2 kg, instead of a hard drive or floppy disk, it containedDrive 2 MB RAM, but it reduces its usefulness and greatness. The first laptops to contain hard drives were those of the Compaq LTE series, introduced toward the end of this year. Truly, the size of a laptop, they have an illuminated display with a resolution of CGA (but not the color CGA).
The Macintosh Portable, Apple's first attempt at a drive battery computerThe first Apple Computer machine designed to be used on the road 1989 Macintosh Portable(Even if an LCD is an option for the transportable Apple IIc in 1984). In reality a "luggable" The Mac laptop has battery life been praised for its clear active matrix display and long, but a bad seller was due to its volume. In the absence of a true Apple laptop, several compatible devices such as laptops were available departing for Mac users, but for copyright reasons, users need a set of Mac ROMs, which one meant to buy a new or usedMacintosh as well.
The Apple PowerBook series, which in October 1991, launched pioneering change, the now de facto standards on laptops, such as the placement of the keyboard, palm rest and the inclusion of a built-in device pointing device (trackball). The following year published his IBM Thinkpad 700C, with a similar design (but with a distinctive red TrackPoint pointing device).
Later PowerBooks introduced the first 256 color displays (PowerBook 165c, 1993) andfirst true touchpad, first registered its 16-bit, and the first time in the Ethernet adapter (PowerBook 500, 1994) built.
Summer 1995 was a milestone in the history of mobile computing. In August of this year introduced, Microsoft Windows 95 It was the first time that Microsoft had placed much of the management control of the energy in the OS. Before that date, each brand used custom BIOS, drivers, and in some cases, ASICs, to optimize the battery life of theirMachines. The decision by Microsoft was in the eyes of notebook designers controversial because it greatly reduces their ability to innovate, but to play its role in simplifying and stabilizing certain aspects of portable design. Windows 95 also ushered in the importance of the CD-ROM in mobile computing and initiated the transition to the Intel Pentium platform as a base for laptop computers. The Gateway Solo was the first notebook with a Pentium processor and a CD-ROM introduced. ByEven with a removable hard disk size and disk was the first of three spindle (optical, floppy and hard disk drive) notebook computer. The Gateway Solo was a great success in the consumer segment of the market. In about the same period, Dell Latitude, Toshiba and IBM Thinkpad addressed achieve great success with the drive to two pins (Pentium disk drive) systems to the corporate market.
An old (1997) MicronLaptops technology has improved in the 1990s increased the value and popularity of laptops. fell by the disadvantages. Several developments specific to laptops were quickly implemented, improving usability and performance. Among them:
Improved battery technology. The heavy lead-acid batteries are replaced with technology easier and more efficient nickel-cadmium or NiCd FIRST, then nickel-metal hydride (NiMH) and lithium-ion and lithium polymer.
Energy-efficient processors. While laptops in 1991 were on the 80286 processor because of the energy needs 80 386 more restricted by the introduction of the Intel 386SL, for the power needs of laptops, marked the projected point at which laptop needs were included in the design of the processor. The 386SL integrated a 386SX core with a memory controller that was coupled with an I / O chip to create the SL chipset. It was much more integrated than any previous solution althoughits cost is higher. There was strong from the major notebook brands of the time accepted. Intel followed with the 486SL chipset which used the same architecture. However, Intel had to design this approach as it introduced its Pentium series give up. Early versions of the mobile Pentium required bracket (also in the production of LCD) is used, which initially limited the number of companies able to laptops. However, Intel eventually migrate to more standard chip packaging.One limitation of notebooks has always the difficulty of upgrading the processor, which was a common attribute of desktops. Intel has attempted to solve this problem with the introduction of the MMC for mobile computing. The MMC is a standard module, which could sit on the processor and cache memory, external. It gave the notebook buyer the opportunity to have their processors at a later time to update simplifies the manufacturing process some, and was also used in some cases import duty of U.S. rock that the CPU canadded to the chassis plug on his arrival in the U.S. Intel with MMC for a few generations but ultimately could not maintain the appropriate speed and integrity of the data in the memory subsystem through the MMC connector.
Improved liquid crystal displays, particularly active-matrix TFT (Thin-Flim forwarder) LCD technology. Early laptop screens were black and white, blue and white or grayscale (Super Twist Nematic) passive-matrix LCD prone to heavy shadows, ghosting and blurry in STNMovement (some portable computer screens were sharper monochrome plasma displays, but they drew too much current through the batteries are powered). Color STN screens were used for some time, even though their picture quality was poor. By the year 1991 entry into two new color LCD Techologies the consumer market exists; Dual STN and TFT. The Dual STN screens solved many problems of the STN display at a very affordable price and the TFT provides excellent image quality, althoughinitially at a high price. DSTN continued to a significant cost advantage over TFT until the mid-90s range before the cost delta dropped to the point that DSTN was no longer used in notebooks. Improved production techniques mean that most shows were sharper, had higher native resolutions, faster response time and can display color with great accuracy, so that it is an acceptable substitute for a traditional CRT monitor.
Improvement of HDD technology. Early laptops and notebookshad only floppy disk drives. As thin, high capacity hard drives with higher reliability and shock resistance and lower power consumption became available, users can save work on their laptops and take it with them. The 3.5 "hard drive was originally created in response to the needs of notebook designers that needed smaller products, low energy consumption. The pressure to continue reducing the size of laptop even further, the disc was introduced Hard 2.5".
improved connectivity. Internal modems and standard serial, parallel and PS / 2 ports on IBM-compatible PC laptops it easier for working away from home, adding network cards and, since 1997, USB, and from 1999, Wi-Fi laptops easily to computer peripherals such as a desktop.
The $ 100 Laptop
The first generation prototype of the laptop for $ 100
In 2005, presented the members of the faculty of the MIT Media Lab Nicholas Negroponte, including $ 100Laptop> and the One Laptop Per Child project. The goal is to design, manufacture and sale laptops that are so cheap, offer every child in the world access to knowledge and modern forms of education. The laptops will be sold to governments and to the children of the schools. These institutions, including many prototypes have already been presented are robust, Linux-based and energy efficiency and a dynamo crank alone can adequatelyPower to operate (even if the crank since withdrawn). Ad-hoc wireless mesh networking can be used to allow many machines to share a single Internet connection.
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