MS-DOS Turns 30

During its life, MS-DOS would go through eight versions


30th Birth Anniversary of MS-DOS

Today MS-DOS is 30 years old. Thirty years ago, on July 27, 1981, Microsoft gave the name MS-DOS to the disk operating system it bought from Seattle Computer Products, a hardware company owned by Rod Brock.

MS-DOS (Microsoft Disk Operating System) is an operating system for x86-based personal computers. MS-DOS grew from a 1981 request by IBM for an operating system for its IBM PC range of personal computers.

MS-DOS Command-line

An example of MS-DOS’s command-line interface, this one showing that the current directory is the root of drive C.

Source: Wikipedia

MS-DOS Advertisement in 1981

Source: Wikipedia

Microsoft bought 86-DOS written by Tim Paterson, informally known as QDOS (Quick and Dirty Operating System), from Seattle Computer Products for $75,000 and licensed it as its own.

Development started in 1981 to meet IBM’s specification, and the first edition, MS-DOS 1.0, was released with the IBM PC in 1982 as PC DOS.

Although MS-DOS and PC-DOS were initially developed in parallel by Microsoft and IBM, the two products eventually went their separate ways.

During its life, MS-DOS would go through eight versions, until development ceased on September 14, 2000.

Tim Paterson is the original author of DOS, and he is called the Father of DOS.

If you are interested to learn more about DOS, check out Tim Paterson’s website and blog:

Paterson Technology
Paterson Technology is owned and operated by Tim Paterson, the original author of DOS.
Origins of DOS
DosMan Drivel
From the original author of DOS

Wikipedia has an excellent account of the history of x86 DOS operating systems:

Important Events in DOS History
This article presents a timeline of events in the history of x86 DOS operating systems from 1973 to 2006.
DOS Operating Systems
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