Short for Operating System/2. A protected-mode, virtual-memory, multitasking operating system for personal computers based on the Intel 80286, 80386, i486, and Pentium processors. OS/2 can run most MS-DOS applications and can read all MS-DOS disks. OS/2’s Presentation Manager provides a graphical user interface. The latest version, known as OS/2 Warp 4, is a 32-bit operating system that provides networking, Internet, and Java support, as well as speech recognition technology. OS/2 was initially developed as a joint project of Microsoft and IBM but later became an IBM product. See also protected mode, virtual memory.
Single-user computer operating system produced jointly by Microsoft Corporation and IBM for use on large microcomputers. Its main features are multitasking and the ability to access large amounts of internal memory.
It was announced 1987. Microsoft abandoned it 1992 due to its lack of market acceptance.