MS-DOS 4

MS-DOS 4
Version of MS-DOS
Placeholder.png
Version4.x
Preliminary nameMS-DOS 3.40
Release date1988-07
Replaces
MS-DOS 3
Replaced by
MS-DOS 5

MS-DOS 4 is a family of versions of MS-DOS, initially released in 1988.

History[edit | edit source]

Initially, the project was named "MS-DOS 3.40", and under this name was mentioned in the 1988-09 issue of Serbian computer magazine "Svet Kompjutera",[1] as well as in a contract between Microsoft and Zenith Data Systems from August 1987.[2]

MS-DOS 4.00 was released in July 1988, only to be replaced by MS-DOS 4.01 in November 1988 due to a major bug. MS-DOS 4.02 was also mentioned in PX05132, however, if existing, it is yet to be found.[3]

Versions[edit | edit source]

MS-DOS 4.00[edit | edit source]

MS-DOS 4.01[edit | edit source]

Retail Versions[edit | edit source]

OEM Versions[edit | edit source]

MS-DOS 4.01a[edit | edit source]

MS-DOS 4.01d[edit | edit source]

References[edit | edit source]