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Following the introduction of the IBM Personal Computer, or IBM PC, many other personal computer architectures became extinct within just a few years.〔(about the IBM-PC and its dominance in the market )〕 == Before the IBM PC's introduction == Before the IBM PC was introduced, the personal computer market was dominated by systems using the 6502 and Z80 8-bit microprocessors, such as the TRS 80, Commodore PET and Apple II series, which used proprietary operating systems, and by computers running CP/M. After IBM introduced the IBM PC, it was not until 1984 that IBM PC and clones became the dominant computers.〔http://arstechnica.com/business/2012/08/from-altair-to-ipad-35-years-of-personal-computer-market-share/2/〕 In 1983, Byte forecast that by 1990, IBM would command only 11% of business computer sales. Commodore was predicted to hold a slim lead in a highly competitive market, at 11.9%. Around 1978, several 16-bit CPUs became available. Examples included the Data General mN601, Fairchild's 9440, the Ferranti F100-1, the General Instrument CP1600 and CP1610, the National Semiconductor INS8900, Panafacom's MN1610,〔http://www.cpu-museum.com/161x_e.htm〕 Texas Instruments' TMS9900, and, most notably, the Intel 8086. These new processors were expensive to incorporate in personal computers, as they used a 16-bit data bus and needed rare (and thus expensive) 16-bit peripheral and support chips. More than 50 new business-oriented personal computer systems came on the market in the year before IBM released the IBM PC.〔(systems released in 1980 )〕〔(systems released in 1981 )〕 Very few of them used a 16- or 32-bit microprocessor, as 8-bit systems were generally believed by the vendors to be perfectly adequate, and the Intel 8086 was too expensive to use.〔 The editors asked 17 personal computer executives "Is 8-bit dead?" The response was mixed. Gary Kildall, author of the CP/M operating system, said "We're not too concerned that 8-bit stuff is going to die." Bill Gates said "We need the power of the 16-bit computers for good software design."〕 Some of the main manufacturers selling 8-bit business systems during this period were * Apple Computer Inc. * Commodore International * Cromemco * Digital Equipment Corporation * Durango Systems inc. * Hewlett-Packard * Intersystems * Morrow Designs * North Star Computers * Ohio Scientific * Olivetti * Processor Technology * Sharp * South West Technical Products Corporation * Tandy Corporation * Zenith Data Systems/Heathkit 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「Influence of the IBM PC on the personal computer market」の詳細全文を読む スポンサード リンク
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