MS-DOS 4.0 was a multitasking release of MS-DOS developed by Microsoft based on MS-DOS 2.0. Lack of interest from OEMs, particularly IBM (who previously...

MS-DOS 6, Microsoft preannounced in 1994 that MS-DOS 7 would incorporate multitasking and a few other new features planned for the upcoming Windows 4.0,...

Microsoft MS-DOS family: MS-DOS 4.0 (multitasking), a multitasking version in 1986/1987 by Microsoft MS-DOS 4.1 (multitasking), a multitasking version for...

Release date: November, 1989 MS-DOS 4.0 (multitasking) and MS-DOS 4.1 – A separate branch of development with additional multitasking features, released between...

graphical programs designed for Windows, as well as existing MS-DOS software. It included multitasking and the use of the mouse, and various built-in programs...

Concurrent DOS V60 FlexOS DR DOS PC DOS – IBM's OEM version of (single-user) MS-DOS MS-DOS 4.0 (multitasking) PC-MOS/386 – unrelated multitasking DOS clone...

advantage. In late 1987, Windows/386 2.0 introduced a protected mode kernel that can multitask several MS-DOS applications using virtual 8086 mode, but...

DOS Shell is a file manager that debuted in MS-DOS and PC DOS version 4.0, released in June 1988. It was no longer included in MS-DOS version 6, but remained...

in 1987 MS-DOS 4.0 (multitasking), a multitasking operating system Multitasking DOS sub-system in IBM OS/2, e.g. C:\OS2\MDOS\ Multiuser DOS (aka DR MDOS)...

(overlapping and side-by-side) in a multitasking fashion. Microsoft later released a multitasking version of MS-DOS 4.0 (multitasking) from what it learned from...