Personal computers, also known as personal computers, the English abbreviation for the pc, the personal computer. François gernelle 1973, French engineer and andré truong invented the first personal computer micral. General personal computer system into two models and two in the models into a common desktop and notebook computers. On the system are ibm (ibm) integrated development of the ibm pc / at system standard, and Apple Macintosh systems developed. Narrow sense, refers to the former personal computers (ibm integrated development of the pc / at), ibm pc / at standard thanks to an open x86 architecture to support access to most of the manufacturers, to become the market mainstream, it is generally intended to say pc refers to the ibm pc / at compatible computers, the architecture of the central processor vendors such as Intel or amd produced by the central processor. 1980, ibm launch of Intel's x86 hardware architecture and Microsoft's ms-dos personal computer operating system, and to develop the pc / at the specifications for the pc. After the launch of the Intel microprocessors and Microsoft operating system launched by the development is almost equivalent to the history of personal computers. wintel architecture completely replace the ibm leading position in the personal computer. X86 architecture developed by Toshiba, the world's first laptop computer. The desktop for an open hardware architecture, so in addition to the brand, the self-assembly of the white box computer is also extremely popular. Structure of the host PC ● classified according to size and mobility: Desktop Computer Servers Mobile computer Notebook Tablet computers Personal Digital Assistant (pda) Wearable Computer ● Structure ○ Motherboard: motherboard is the computer's main circuit board (pcb). The computer's other hardware directly into the motherboard in general to exchange information. Usually chip_set_ motherboard, bios, cmos, parallel port, ps / 2 keyboard and mouse ports and expansion slots composition. ○ CPU: CPU is the most important decision of computing power computer components, computer programs and operating systems running on it. Most ibm x86-compatible computer with processor architecture, they are by the Intel (Intel), AMD (amd), VIA (via) or Transmeta (transmeta) production. ○ memory: random access memory, or ram is the computer's "short-term temporary storage", it read and write speed is much higher than the hard drive or CD-ROM, as these large-capacity storage devices, but when the system is shut down or when it is no power supply memory contents will be lost. ○ Hard: permanent storage of information machines. ○ computer power essential. Through a home computer to provide a stable AC power to DC. ○ pc operating system is currently the highest share of the market Microsoft has launched a series of windows, followed by a series of class unix operating system, such as open architecture, and gradually rose up the gnulinux, and freebsd, dos series. Manufacturer Dell (dell), Hewlett-Packard (hp), Siemens (siemens), Lenovo (lenovo), ibm, ASUS (asus) and so is a worldwide brand. Ibm personal computer business in 2005 and notebook computer business and fully incorporated into China's Lenovo Group. PC History 1971 - Intel Corporation produced its first microprocessor --4,004. 1974 - Intel Corporation to produce 8080-based micro integrated circuit chip, with it came to the chip cpu's "altair" computer. The name of the movie "Star Trek" fragment, named after a galaxy, it As a _set_ of amateurs 400 U.S. dollars worth of tools a sign of successful production of personal computers. 1975 - Bill Gates and Paul Allen _set_ up Microsoft, and developed the basic language of computer use altair. 1975 - ibm company announced the price of $ 8,975 to start the 50-pound portable computer market 5100. 1976 - Steve Wozniak and Steve Jobs introduced Apple i studio computers, this power Tilt in front of the brain, on a wooden box, bolted, and the sale price of $ 666.66. 1977 - Steve Jobs of Apple Computer introduced Apple ii type, it features color graphics and use information stored on tape. August 12, 1981 - ibm information intel 8088 processor introduced in the run on personal computers. The 5150-based computer is the prototype of modern pc and ms-dos (Microsoft Disk Operating System) on the run. November 1983 - Apple's Steve Jobs comdex exhibition for the first time demonstrated the exciting of macintosh computers, from the PC interface is gradually waking up vivid characters, highly personalized Replaced by a graphical interface, multimedia technology is widely applied in the spring is coming. 1985 - intel386 type of chip multi-tasking. Microsoft windows operating system first released. In 1986, the Microsoft price of $ 21.00 per share offered to the public stock. 1990 - Microsoft released windows 3.0 1993 - intel Pentium processor introduced 1995 - windows 95-to-market, and in 4 days more than 100 million copies sold. In addition, Microsoft suggested that the Internet will function by adding all of its products. 1997 - World chess champion Garry Kasparov was ibm's "Deep Blue" supercomputer defeated. 2000 - Intel Corporation launched with 42 million transistors in the Pentium 4 processor running at up to 1.5ghz, with an Intel 1971 chip, the speed of 108 kHz is quite different. With the rapid development of information technology, this year, tablet PCs and PDAs have become the two main personal computer. Relative to desktop computers and laptops, for tablet PCs and PDAs more functional and portable.