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The 1535EXP was also the first rugged portable PC to attain full TEMPEST accreditation from the NSA. [3] Another modification – the Grid GRiDCASE 1537EXP – has another screen (640×480 instead of 640×400, but with less physical size). The power input is 100–240 V AC 50/60/400 Hz, 80 W.
Some of the earliest computers were military computers. Military requirements for portability and ruggedness led to some of the earliest transistorized computers, such as the 1958 AN/USQ-17, the 1959 AN/MYK-1 (), the 1960 M18 FADAC, and the 1962 D-17B; the earliest integrated-circuit based computer, the 1964 D-37C; as well as one of the earliest laptop computers, the 1982 Grid Compass.
A rugged tablet may be semi-rugged or fully rugged. The semi-rugged might have a protective case, rain-resistant body. Fully rugged tablets are engineered from the inside-out to work in extreme temperatures and other harsh conditions. They are designed to resist drops, shocks and vibrations while maintaining strength to be dust- and waterproof.
The Compaq Portable, one of the first IBM PC compatible systems A military-type mobile computer housed in a reinforced case A portable computer with three LCD screens A portable computer with one 20.1-inch LCD screen, EATX motherboard The MIT Suitcase Computer, MIT Digital Systems Laboratory, 1975. A portable computer is a computer designed to ...
GridPad (1989). In 1988, Tandy Corporation purchased the Grid company. [3] AST Computer acquired the US wing of company, and was itself later acquired by Samsung. [4]Grid still produced the GRiDCASE laptops, and the first GridPad tablet also was released in 1989; [5] Also a few rebranded models of another manufacturers were released, include Tandy/Victor Technologies Grid 386 (Compaq SLT clone ...
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 Palm TX PDA; An ultra mobile PC is a full-featured, PDA-sized computer running a general-purpose operating system. Phones, tablets: a slate tablet is shaped like a paper notebook. Smartphones are ...
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Compaq's efforts were possible because IBM had used mostly off-the-shelf parts for the PC and published full technical documentation for it, and because Microsoft had kept the right to license MS-DOS to other computer manufacturers. The main difficulty was the BIOS, because it contained IBM's copyrighted code.