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The lap desk appeared sometime in the 17th century and became a stylish accessory for travelling gentlemen. Like the Bible box, the lap desk was usually small enough to be carried on a horse or by a gentleman's butler or valet. From the 18th century onward, however, it grew in size and became too heavy to be used comfortably on a lap.
An antique lap desk. As an antique the lap desk is a smaller variant of the writing slope. It is also called a writing box or a writing cabinet. In certain instances it is known as a portable desk, a term which is usually applied to larger forms. Most antique lap desks are meant to be used on a table or some other stable surface.
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 notebook computer or notebook is, historically, a laptop whose length and width approximate that of letter paper (8.5 by 11 inches or 220 by 280 millimetres). [a] The term notebook was coined to describe slab-like portable computers that had a letter-paper footprint, such as Epson's HX-20 and Tandy's TRS-80 Model 100 of the early 1980s.
In 1985, Compaq introduced the Portable 286, but it was replaced by the more compact Portable II in a redesigned case within a few months. The Portable 286 featured a full-height hard disk, and the options of one half-height floppy drive, two half-height floppy drives, or a half-height floppy drive and a tape backup drive.
A mobile workstation, also known as a desktop replacement computer (DTR) or workstation laptop, is a personal computer that provides the full capabilities of a workstation-class desktop computer while remaining mobile.
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