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* Overam - Mirage series * Notebooks smaller than a A4 sheet of paper and weighing around 1 kg are sometimes called sub-notebooks or subnotebooks. * Improved interconnectivity. Internal modems and standard serial, parallel, and PS/2 ports on IBM PC-compatible laptops made it easier to work away from home; the addition of Ethernet networking ports and, from 1997, USB, and from 1999, Wi-Fi, made laptops as easy to use with peripherals as a desktop computer. * Improved interconnectivity. Internal modems and standard serial, parallel, and PS/2 ports on IBM PC-compatible laptops made it easier to work away from home; the addition of Ethernet networking ports and, from 1997, USB, and from 1999, Wi-Fi, made laptops as easy to use with peripherals as a desktop computer. * Notebook Laptops usually run on batteries, but also from adapters which also charge the battery using mains electricity. * Notebook

As technology improved during the 1990s, the usefulness and popularity of laptops increased while prices went down. Several developments specific to laptops were quickly implemented in their design, improving their usability and performance compared to desktop computers. Among them were: * Apple Computer - iBook, PowerBook and MacBook Pro * Voodoo PC - Envy * Clevo Many parts for a laptop computer are smaller, lighter, or otherwise adapted from the corresponding part in a desktop computer: * Hypersonic * Most laptops are powered or recharged from an external AC converter that usually takes the form of a plain black rectangular box. These devices weigh about 500 g (about 1 lb) and often take the name "power brick."

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Despite their name, using a laptop on one's lap can be both unpleasant (due to heat from the computer, particularly from its CPU) and possibly even dangerous to the laptop, as it may overheat. It is sometimes preferable to use a laptop on a desk. However, arguably the first true laptop was the GRiD Compass 1101, designed by Bill Moggridge in 1979, and released in 1982. Enclosed in a magnesium case, it introduced the now familiar clamshell design, in which the flat display folded shut against the keyboard. The computer could be run from batteries, and was equipped with a 320×200-pixel plasma display and 384-kilobyte bubble memory. It was not IBM-compatible, and its high price (US$ 10,000) meant that it was limited to specialized applications. However, it was used heavily by the U.S. military, and was used on the Space Shuttle during the 1980s. The GRiD company subsequently earned significant returns on its patent rights as its innovations became commonplace. GRiD Systems Corp was later bought by Tandy (RadioShack). The Apple PowerBook series, introduced in 1991, heralded many changes that are now standard on laptops, including ergonomic improvements such as the placement of the keyboard at the back of the machine, thus creating a palm rest, and the inclusion of a built-in pointing device (a trackball). The following year, IBM released its Thinkpad series, offering similar miniaturization. * NEC - VERSA, LaVie Laptop performance has been inferior to desktops for the same price. Desktops have outperformed mobile computers because new technologies expend more heat. These new technologies take time to transfer over to the laptop market because of its smaller package. While desktops continue to outperform notebooks at the high end, both types of systems generally offer sufficient performance for the mainstream. This still existent difference in performance continues to be minimized. * Hewlett Packard - HP Pavilion and HP Omnibook * ECS * Hewlett Packard - HP Pavilion and HP Omnibook

* Averatec By the end of the 1980s, laptop computers were becoming popular among business people. The NEC Ultralite, released in mid-1989, was perhaps the first notebook computer, weighing just over 2 kg; in lieu of a floppy or hard drive, it contained a 2-megabyte RAM drive, but this reduced its utility as well as its size. The first notebook computers with standard drives were the Compaq LTE series, introduced toward the end of that year. Truly the size of a notebook, they had hard drives and standard-resolution screens. * Sager - NP series * Tadpole - SPARCbook 1983 also saw the launch of what was probably the biggest-selling early laptop, the Kyocera Kyotronic 85. Although it was at first a slow seller in Japan, it was quickly licensed by Tandy Corporation, Olivetti, and NEC, who saw its potential and marketed it as the Olivetti M-10, NEC PC-8201, and [1] Radio Shack TRS-80_Model_100_line or Tandy 100. The machines ran on standard AA batteries. The Tandy's internal programs, including a BASIC interpreter, a text editor, and a terminal program, were supplied by Microsoft, and are thought to have been written in part by Bill Gates himself. The computer was not a clamshell, but provided a tiltable 8×40-character LCD screen above a full-travel keyboard. With its internal modem, it was a highly portable communications terminal. Due to its portability, good battery life (and ease of replacement), reliability (it had no moving parts), and low price (as little as US $300), the model was highly regarded, becoming a favorite among journalists. It weighed less than 2 kg (4 lb) with dimensions of 30 x 21.5 x 4.5 cm (12 x 8.5 x 1.75 inches). Initial specs included 8 kb of RAM (expandable to 24 kb) and a 3 MHz processor. As technology improved during the 1990s, the usefulness and popularity of laptops increased while prices went down. Several developments specific to laptops were quickly implemented in their design, improving their usability and performance compared to desktop computers. Among them were: * Hypersonic * Tablet PC