MS-DOS 4

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

Features

 * Support for EGA and VGA display adapters.
 * Support for FAT16 partitions larger than 32 MB.
 * Support for LIM / EMS standard (driver, access to additional memory on IBM PC AT-386 and higher), which allowed individual parts of MS-DOS to load into additional memory.
 * Full-fledged support of the Russian language.
 * Improving the Select installation program. The process of installation and configuration is greatly simplified. It automatically creates the appropriate  and   files.
 * The introduction of a new  command, which allows you to analyze the current memory configuration.
 * Four countries are included in the list of supported countries.
 * Graphic printing.
 * Various new features in existing commands:,  ,  ,  ,  ,  ,  ,  ,  ,  ,  ,  ,  ,.
 * Improved system drivers, including:,  ,  ,.
 * MS-DOS shell.

History
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", as well as in a contract between Microsoft and Zenith Data Systems from August 1987.

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.