<P> The Osborne 1 is considered the first true mobile computer by most historians . Adam Osborne founded Osborne Computer and formed the Osborne 1 in 1981 . The Osborne 1 had a five - inch screen, incorporating a modem port, two 5 1 / 4 floppy drives, a big collection of bundled software applications, and a battery pack . The computer company was a failure and did not last for very long . Although it was large and heavy compared to today's laptops, with a tiny 5" CRT monitor, it had a near - revolutionary impact on business, as professionals were able to take their computer and data with them for the first time . This and other "luggables" were inspired by what was probably the first portable computer, the Xerox NoteTaker . The Osborne was about the size of a portable sewing machine, and could be carried on commercial aircraft . The Osborne 1 weighed close to 11 kg and was priced at $1795 . </P> <P> Although it wasn't released until 1985, well after the decline of CP / M as a major operating system, the Bondwell 2 is one of only a handful of CP / M laptops . It used a Z - 80 CPU running at 4 MHz, had 64 KBs of RAM, and a 3.5" floppy disk drive built in, which was unusual for CP / M laptops . The flip - up LCD display's resolution was 640x200 pixels . Bondwell 2 also included MicroPro's complete line of CP / M software, including WordStar . The Bondwell 2 was capable of displaying bitmapped graphics . The price of the Bondwell 2 was listed at $995 . </P> <P> The Compaq Portable was the first portable computer created in 1982 which one of the first 100% IBM PC compatible systems . The first shipment was in March 1983 and was priced at $2,995 . The Compaq Portable folded up into a luggable case the size of a portable sewing machine . The third model of this development, Compaq Portable II, featured high resolution graphics on its tube display . It was the first portable computer ready to be used on the shop floor, and for CAD and diagram display . It established Compaq as a major brand on the market . </P> <P> Another significant machine announced in 1981, although first sold widely in 1983, was the Epson HX - 20 . A simple handheld computer, it featured a full - transit 68 - key keyboard, rechargeable nickel - cadmium batteries, a small (120 × 32 - pixel) dot - matrix LCD with 4 lines of text, 20 characters per line text mode, a 24 column dot matrix printer, a Microsoft BASIC interpreter, and 16 KB of RAM (expandable to 32 KB). Through at least the late 1980s Epson continued to release laptops such as the L3s . </P>

When was the world's first laptop introduced in market and by which company
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