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IBM PC - translation to English

PERSONAL COMPUTER MODEL RELEASED IN 1981

IBMPC; IBM 5150; Ibm 5150; IBM-PC; IBM PCs; IBM/PC; IBM PC 5150; IBM PC; IBM 5150 PC; 5150s; IBM personal computer; Project chess; Project Chess; IBM home computer

IBM PC

الحاسوب الشخصى لشركة IBM

IBM XT

PERSONAL COMPUTER MODEL

IBM PC-XT; PC/XT; PC XT; PC-XT; IBM XT; XT class; IBM/XT; IBM 5160 Personal Computer XT; IBM 5160; IBM 5162 Personal Computer XT/286; IBM PC/XT; XT Computer; IBM XT 286; IBM PC XT; IBM model 5160; 286 XT; IBM PC 5160; IBM Personal Computer/XT; IBM 5162; XT clones

حاسوب شخصى ذو التقنية الممتدة .

IBM AT

PERSONAL COMPUTER MODEL

IBM PC AT; IBM PC/AT; IBM PC-AT; PC/AT; PC AT; IBM AT; IBM/AT; IBM 5170 Personal Computer/AT; IBM 5170; IBM Personal Computer/AT; 5170s; AT Computer; IBM PC 5170; AT Multiuser System; IBM AT Multiuser System

الحاسوب الشخصى AT .

Definition

IBM PC

<computer> International Business Machines Personal Computer. IBM PCs and compatible models from other vendors are the most widely used computer systems in the world. They are typically single user personal computers, although they have been adapted into multi-user models for special applications. Note: "IBM PC" is used in this dictionary to denote IBM and compatible personal computers, and to distinguish these from other personal computers, though the phrase "PC" is often used elsewhere, by those who know no better, to mean "IBM PC or compatible". There are hundreds of models of IBM compatible computers. They are based on Intel's microprocessors: Intel 8086, Intel 8088, Intel 80286, Intel 80386, Intel 486 or Pentium. The models of IBM's first-generation Personal Computer (PC) series have names: IBM PC, IBM PC XT, {IBM PC AT}, Convertible and Portable. The models of its second generation, the Personal System/2 (PS/2), are known by model number: Model 25, Model 30. Within each series, the models are also commonly referenced by their CPU clock rate. All IBM personal computers are software compatible with each other in general, but not every program will work in every machine. Some programs are time sensitive to a particular speed class. Older programs will not take advantage of newer higher-resolution display standards. The speed of the CPU (microprocessor) is the most significant factor in machine performance. It is determined by its clock rate and the number of bits it can process internally. It is also determined by the number of bits it transfers across its data bus. The second major performance factor is the speed of the hard disk. CAD and other graphics-intensive application programs can be sped up with the addition of a mathematics coprocessor, a chip which plugs into a special socket available in almost all machines. Intel 8086 and Intel 8088-based PCs require EMS (expanded memory) boards to work with more than one megabyte of memory. All these machines run under MS-DOS. The original IBM PC AT used an Intel 80286 processor which can access up to 16 megabytes of memory (though standard MS-DOS applications cannot use more than one megabyte without EMS). Intel 80286-based computers running under OS/2 can work with the maximum memory. Although IBM sells printers for PCs, most printers will work with them. As with display hardware, the software vendor must support a wide variety of printers. Each program must be installed with the appropriate printer driver. The original 1981 IBM PC's keyboard was severely criticised by typists for its non-standard placement of the return and left shift keys. In 1984, IBM corrected this on its AT keyboard, but shortened the backspace key, making it harder to reach. In 1987, it introduced its Enhanced keyboard, which relocated all the function keys and placed the control key in an awkward location for touch typists. The escape key was relocated to the opposite side of the keyboard. By relocating the function keys, IBM made it impossible for software vendors to use them intelligently. What's easy to reach on one keyboard is difficult on the other, and vice versa. To the touch typist, these deficiencies are maddening. An "IBM PC compatible" may have a keyboard which does not recognize every key combination a true IBM PC does, e.g. shifted cursor keys. In addition, the "compatible" vendors sometimes use proprietary keyboard interfaces, preventing you from replacing the keyboard. The 1981 PC had 360K floppy disks. In 1984, IBM introduced the 1.2 megabyte floppy disk along with its AT model. Although often used as backup storage, the high density floppy is not often used for interchangeability. In 1986, IBM introduced the 720K 3.5" microfloppy disk on its Convertible laptop computer. It introduced the 1.44 megabyte double density version with the PS/2 line. These disk drives can be added to existing PCs. Fixed, non-removable, hard disks for IBM compatibles are available with storage capacities from 20 to over 600 megabytes. If a hard disk is added that is not compatible with the existing disk controller, a new controller board must be plugged in. However, one disk's internal standard does not conflict with another, since all programs and data must be copied onto it to begin with. Removable hard disks that hold at least 20 megabytes are also available. When a new peripheral device, such as a monitor or scanner, is added to an IBM compatible, a corresponding, new controller board must be plugged into an expansion slot (in the bus) in order to electronically control its operation. The PC and XT had eight-bit busses; the AT had a 16-bit bus. 16-bit boards will not fit into 8-bit slots, but 8-bit boards will fit into 16-bit slots. Intel 80286 and Intel 80386 computers provide both 8-bit and 16-bit slots, while the 386s also have proprietary 32-bit memory slots. The bus in high-end models of the PS/2 line is called "Micro Channel". EISA is a non-IBM rival to Micro Channel. The original IBM PC came with BASIC in ROM. Later, Basic and BasicA were distributed on floppy but ran and referenced routines in ROM. IBM PC and PS/2 models PC range Intro CPU Features PC Aug 1981 8088 Floppy disk system XT Mar 1983 8088 Slow hard disk XT/370 Oct 1983 8088 IBM 370 mainframe emulation 3270 PC Oct 1983 8088 with 3270 terminal emulation PCjr Nov 1983 8088 Floppy-based home computer PC Portable Feb 1984 8088 Floppy-based portable AT Aug 1984 286 Medium-speed hard disk Convertible Apr 1986 8088 Microfloppy laptop portable XT 286 Sep 1986 286 Slow hard disk PS/2 range Intro CPU Features Model 1987-08-25 8086 PC bus (limited expansion) Model 1987-04-30 8086 PC bus Model 30 1988-09-286 286 PC bus Model 1987-04-50 286 Micro Channel bus Model 50Z Jun 1988 286 Faster Model 50 Model 55 SX May 1989 386SX Micro Channel bus Model 1987-04-60 286 Micro Channel bus Model 1988-06-70 386 Desktop, Micro Channel bus Model P1989-05-70 386 Portable, Micro Channel bus Model 1987-04-80 386 Tower, Micro Channel bus IBM PC compatible specifications CPU CPU Clock Bus Floppy Hard bus speed width RAM disk disk OS bit Mhz bit byte inch byte Mbyte 8088 16 4.8-9.5 8 1M* 5.25 360K 10-40 DOS 3.5 720K 3.5 1.44M 8086 16 6-12 16 1M* 20-60 286 16 6-25 16 1-8M* 5.25 360K 20-300 DOS 5.25 1.2M OS/2 386 32 16-33 32 1-16M** 3.5 720K Unix 3.5 1.44M 40-600 386SX 32 16-33 16 1-16M** 40-600 *Under DOS, RAM is expanded beyond 1M with EMS memory boards **Under DOS, RAM is expanded beyond 1M with normal "extended" memory and a memory management program. See also BIOS, display standard. (1995-05-12)

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Wikipedia

IBM Personal Computer

The IBM Personal Computer (model 5150, commonly known as the IBM PC) is the first microcomputer released in the IBM PC model line and the basis for the IBM PC compatible de facto standard. Released on August 12, 1981, it was created by a team of engineers and designers directed by Don Estridge in Boca Raton, Florida.

The machine was based on open architecture and third-party peripherals. Over time, expansion cards and software technology increased to support it.

The PC had a substantial influence on the personal computer market. The specifications of the IBM PC became one of the most popular computer design standards in the world. The only significant competition it faced from a non-compatible platform throughout the 1980s was from the Apple Macintosh product line. The majority of contemporary personal computers are distant descendants of the IBM PC.

https://en.wikipedia.org/wiki/IBM Personal Computer

Examples of use of IBM PC

1. "In 1'81 I had an IBM PC, two–floppy system," Howle said.

2. I always preferred it over the Apple II and even the first IBM PC Clones.

3. Several popular home computers existed before the 1'81 IBM PC launch.

4. Business experts say timing was everything for the IBM PC launch.

5. Last year, Lenovo bought the IBM PC Division and moved its executive headquarters from China to the United States.