PC DOS

PC DOS
Developer	Microsoft, IBM
Publisher	IBM
Platforms	x86
Released	PC DOS 1.0: August 12, 1981 MS-DOS 1.24: March 1982 PC-DOS 1.10: May 7, 1982 MS-DOS/Z-DOS 1.01: May, 1983 TI BOOT V. 1.13: August 1983 Compaq-DOS 1.12: November 1983 Z-DOS 1.19: 1983
Added to Museum	Not yet

PC DOS, also known as IBM PC DOS, is an operating system by Microsoft and IBM.

History

Seattle Computer Products released 86-DOS in August 1980. It was licensed and then purchased by Microsoft. The first versions of this operating system and its successors were heavily based on the CP/M operating system.

Microsoft extended 86-DOS into PC DOS for IBM on August 12, 1981.

In 1982, Microsoft began releasing it as MS-DOS while IBM continued to release it as PC DOS. The first version to be published by both companies was PC DOS 1.10 which was the basis for MS-DOS 1.24.

PC DOS version 1.0 was released on August 12, 1981.

PC DOS 1.10 was the basis for MS-DOS 1.24, which were both released in 1982.

1983 saw MS-DOS 1.25, which was the basis for DOS distributions by manufacturers other than IBM. It was used as the basis for a DOS by Compaq as Compaq-DOS 1.12, by Texas Instruments as TI BOOT V. 1.13, by Zenith as Z-DOS 1.01 and 1.19. These were also alternately packaged as MS-DOS 1.01.

MS-DOS 2.0, which was also released in 1983, was completely rewritten from its predecessors.

Versions of PC DOS

Title	Released	Date Added to the Museum	Notes
PC DOS 1.0	1981	Not yet.	PC DOS 1.0 was extended from 86-DOS 1.10.
PC DOS 1.10	1982	Not yet.	1.10 was the basis for MS-DOS 1.24, the first release of that OS.
PC DOS 2.0	1983	Not yet	2.0 was completely rewritten from its predecessors.