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A Palmtop PC was an about pocket calculator-sized, battery-powered PC in a horizontal clamshell design with integrated keyboard and display. It could be used like a subnotebook, but was light enough to be comfortably used handheld as well. Most Palmtop PCs were small enough to be stored in a user's shirt or jacket pocket. Palmtop PCs distinguish from other palmtop computers by utilizing a mostly IBM-compatible PC architecture and BIOS as well as an Intel-compatible x86 processor. Most such devices were DOS-based, with DOS stored in ROM. While many Palmtop PCs came with a number of PDA and office applications pre-installed in ROM, most of them could also run generic, off-the-shelf PC software with no or little modifications. Some could also run other operating systems such as GEOS, MINIX 2.0, Windows 1.0-3.0, or Linux. Most Palmtop PCs were based on a static hardware design for low power consumption and instant-on/off without a need to reboot. Depending on the model, the battery could power the device from several hours up to several days while running, or between a week and a year in standby mode. Combined with the instant-on/off feature, a battery would typically last from a week up to several months in practical use as PDA. The first Palmtop PC was the DIP Pocket PC aka Atari Portfolio in 1989. Palmtop computers were discontinued in late 2000's as all the manufacturers shifted to tablets. Palmtop PCs include: *DIP Pocket PC (DIP DOS 2.11, 1989) *Atari Portfolio (DIP DOS 2.11, 1989) *Poqet PC Classic (MS-DOS 3.3, 80C88, 1989) *Poqet PC Prime (MS-DOS 3.3, 80C88) *Poqet PC Plus (MS-DOS 5.0, NEC V30) *ZEOS Pocket PC (MS-DOS 5.0, 1991) *Hewlett-Packard 95LX (MS-DOS 3.22, NEC V20, 1991) *Hewlett-Packard 100LX (MS-DOS 5.0, 80186-compatible HP Hornet, 1993) *Hewlett-Packard Palmtop FX (MS-DOS 5.0, 80186-compatible HP Hornet, 1993) *Hewlett-Packard 200LX (MS-DOS 5.0, 80186-compatible HP Hornet, 1994) *Hewlett-Packard 1000CX (MS-DOS 5.0, 80186-compatible HP Hornet) *Hewlett-Packard OmniGo 700LX (MS-DOS 5.0, 80186-compatible HP Hornet, 1996) Some touch-screen computers may also be counted into this category: *Hewlett-Packard OmniGo 100 (Datalight ROM-DOS+PEN/GEOS 2.1, NEC V30HL-compatible Vadem VG230, 1993) *Hewlett-Packard OmniGo 120 (DOS+PEN/GEOS, NEC V30HL-compatible Vadem VG230) Some clamshell design, ultra-mobile PCs (UMPC) can be seen as successors to this class, f.e.: *Yukyung Viliv N5 (Intel Atom Z520, 2010) ==See also== *Sub-notebook, IBM- and x86- compatible, clamshell design *Netbook, IBM- and x86- compatible, legacy-free, clamshell design *Ultra-mobile PC, IBM- and x86- compatible, legacy-free, not necessarily clamshell design *Palm-size PC, not necessarily IBM- and x86- compatible, various form factors *Handheld PC, not necessarily IBM- and x86- compatible, various form factors *Pocket PC, typically not IBM- or x86-compatible, various form factors *PalmDOS 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Palmtop PC」の詳細全文を読む スポンサード リンク
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