Shepardson Microsystems

Shepardson Microsystems
Company typePrivate
IndustryMicrocomputer Software
FounderRobert Shepardson
Defunct1981 (1981)
SuccessorOptimized Systems Software
Headquarters
Saratoga Springs, New York
,
United States

Shepardson Microsystems, Inc. (SMI) was a small computer programming company founded by Robert (Bob) Shepardson in Saratoga Springs, New York. SMI is best known for producing operating systems and programming languages for CP/M, the Atari 8-bit computers and Apple II. SMI is most noted for the original Apple II disk operating system (DOS), Atari BASIC, and Atari DOS.

In 1981, the owner decided the market for 8-bit software was not sustainable, and returned to a one-man consulting firm. Two of the employees purchased the rights to their systems and formed Optimized Systems Software, which operated until 1988.

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