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IBM PC DOS was a DOS
DOS

DOS, short for "Disk Operating System", is a shorthand term for several closely related operating systems that dominated the IBM PC compatible market between 1981 and 1995, or until about 2000 if one includes the partially DOS-based Microsoft Windows versions Windows 95, Windows 98, and Windows Me....
 operating system for the IBM Personal Computer, sold throughout the 1980s and 2000s.

cial product name of "PC DOS" are as below:

original 1981 arrangement between IBM and Microsoft
Microsoft

Microsoft Corporation is a multinational corporation computer technology corporation that develops, manufactures, licenses, and supports a wide range of computer software products for computing devices....
 was that Microsoft would provide the base product and that both firms would work on developing different parts of it into a more powerful and robust system, and then share the resultant code.






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IBM PC DOS was a DOS
DOS

DOS, short for "Disk Operating System", is a shorthand term for several closely related operating systems that dominated the IBM PC compatible market between 1981 and 1995, or until about 2000 if one includes the partially DOS-based Microsoft Windows versions Windows 95, Windows 98, and Windows Me....
 operating system for the IBM Personal Computer, sold throughout the 1980s and 2000s.

Naming

Official product name of "PC DOS" are as below:
  • IBM Personal Computer Disk Operation System 1.0 (short-name:PC DOS 1.0)
  • IBM Personal Computer Disk Operation System 2.0 (short-name:PC DOS 2.0)
  • IBM Personal Computer Disk Operation System 3.0 (short-name:PC DOS 3.0)
  • IBM DOS 4.0 (IBM changed product name)
  • IBM DOS 5.0
  • IBM PC DOS 6.1 (IBM changed product name again. "PC DOS" is not short-name.)
  • IBM PC DOS 6.3
  • IBM PC DOS 7
  • IBM PC DOS 2000 (IBM's last version)


History

The original 1981 arrangement between IBM and Microsoft
Microsoft

Microsoft Corporation is a multinational corporation computer technology corporation that develops, manufactures, licenses, and supports a wide range of computer software products for computing devices....
 was that Microsoft would provide the base product and that both firms would work on developing different parts of it into a more powerful and robust system, and then share the resultant code. PC DOS and MS-DOS
MS-DOS

MS-DOS is an operating system commercialized by Microsoft. It was the most commonly used member of the DOS family of operating systems and was the main operating system for personal computers during the 1980s....
 were to be marketed separately: IBM selling to itself for the IBM PC, and Microsoft selling to the open market. However, at no time did IBM acquire the ownership of the source code
Source code

In computer science, source code is any collection of statements or declarations written in some human-readable computer programming language....
 of the operating system
Operating system

An operating system is an interface between hardware and applications; it is responsible for the management and coordination of activities and the sharing of the limited resources of the computer....
 for its own PCs
IBM PC

The IBM Personal Computer, commonly known as the IBM PC, is the original version and progenitor of the IBM PC compatible hardware platform ....
.

After Microsoft


PC DOS remained a rebranded version of MS-DOS until 1993. IBM and Microsoft parted ways—MS-DOS 6 was released in March, and PC DOS 6.1 (separately developed) followed in June. QBasic
QBasic

QBasic is an integrated development environment and Interpreted language for a variant of the BASIC programming language which is based on QuickBasic....
 was dropped and the MS-DOS Editor was replaced with E
E (PC-DOS)

E is the text editor which was made part of PC-DOS with version 6.1 in June 1993, and later with version 7 and PC DOS 2000. In version 6.1, IBM dropped QBASIC, which, in its edit mode, was also the system text editor....
. PC DOS 6.3 followed in December.

PC DOS 7 was released in November 1994. The REXX
REXX

REXX is an Interpreted language programming language which was developed at IBM. It is a structured high-level programming language which was designed to be both easy to learn and easy to read....
 programming language was added, as well as support for a new floppy disk
Floppy disk

A floppy disk is a data storage medium that is composed of a disk of thin, flexible magnetic storage medium encased in a square or rectangle plastic shell....
 format, XDF
IBM Extended Density Format

The IBM eXtended Density Format is a way of formatting standard high-density 3.5" and 5.25" floppy disks to larger-than-standard capacities....
, which extended a standard 1.44 MB floppy disk to 1.86 MB.

The most recent release was PC DOS 2000, which found its niche in the embedded software
Embedded software

Embedded software is computer software which plays an integral role in the electronics it is supplied with.Embedded software's principal role is not Information Technology , but rather the interaction with the physical world....
 market and elsewhere. It was based on PC DOS 7, and corrected issues with the Year 2000 problem
Year 2000 problem

The Year 2000 problem was a notable computer bug resulting from the practice in early computer program design of representing the year with two digits....
. Branding of PC DOS 2000 included the phrase "includes PC DOS 7".

ThinkPad
ThinkPad

ThinkPad is a brand of portable laptop and notebook personal computers originally designed, manufactured and sold by IBM. Since early 2005, the ThinkPad range has been manufactured and marketed by Lenovo, which purchased the International Business Machines Personal Computer division....
 products currently have a copy of the latest version of PC DOS in their Rescue and Recovery partition.

For a short time in April 2008, IBM offered the license for PC DOS for just under $10,000, in the operating systems list for custom orders..

Versions

See Comparison of x86 DOS operating systems
Comparison of x86 DOS operating systems

This article details various versions of DOS-compatible operating systems....
 for version information and a timeline.

See also

  • MS-DOS
    MS-DOS

    MS-DOS is an operating system commercialized by Microsoft. It was the most commonly used member of the DOS family of operating systems and was the main operating system for personal computers during the 1980s....
  • Comparison of x86 DOS operating systems
    Comparison of x86 DOS operating systems

    This article details various versions of DOS-compatible operating systems....
  • List of DOS commands
    List of DOS commands

    A partial list of the most common Command s for DOS follows.In versions 5 of DOS and later, the user can get help by typing help at the shell prompt....
  • Rexx
    REXX

    REXX is an Interpreted language programming language which was developed at IBM. It is a structured high-level programming language which was designed to be both easy to learn and easy to read....
  • E (PC-DOS)
    E (PC-DOS)

    E is the text editor which was made part of PC-DOS with version 6.1 in June 1993, and later with version 7 and PC DOS 2000. In version 6.1, IBM dropped QBASIC, which, in its edit mode, was also the system text editor....


External links

  • [ftp://ftp.boulder.ibm.com/software/dos/ ftp://ftp.boulder.ibm.com/software/dos/] PC DOS 2000 (Chinese Edition), freely available for download from IBM