Microsoft MS-DOS Manager (1987) 3 Utility DOS

MS-DOS Manager is a friendly file manager shell provided through OEMs for use with MS-DOS 3.x. It was bundled with systems from Zenith, 3COM, and others. It is similar in operation to the Windows 1.x and 2.x MS-DOS Executive. single or split screen file list (but no drag-and-drop), files may be viewed with details or as a compact list, supports associating file type with external applications, and programs installed on your computer are easily added to an "Applications" dropdown menu.

• 1.00

Microsoft MS-DOS OEM Adaption Kit (1987) 2 DOS

The Microsoft MS-DOS OEM Adaption Kit is a set of source code and binary object files used by OEMs to add custom hardware support. Such hardware support could range from simple hardware add-ons to completely non IBM-PC hardware compatible x86 machines. By the time of MS-DOS 3.3, the market had mostly settled on generic IBM PC hardware clones that would run "vanilla" MS-DOS distributions. MS-DOS 3.2 was the first DOS version to have a true retail "vanilla" release.

• 3.x

Multitasking MS-DOS 4.00 (1985) 32 DOS

Multitasking "MS-DOS 4.00" is a developmental version of MS-DOS that was never released to retail consumers. It was eventually licensed to some companies for internal use. Development started in parallel during the DOS 2.x days, and was intended to be the successor to MS-DOS 3.x. It would have competed against Digital Research's Concurrent DOS.

• 4.00

Zenith MS-DOS Programmer's Utility Pack (1984) 3 DOS

The Zenith Programmer's Utility Pack for MS-DOS contains source code and compiler utilities needed for building an MS-DOS BIOS (IO.SYS file) for use with the Zenith Z-100 (not IBM hardware compatible), the Zenith Z-100 PC (IBM hardware compatible), and the Zenith Z-100 PC running in Z-100 compatibility mode.

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