PC-DOS (1981) 222 DOS

IBM PC-DOS was an IBM branded version of MS-DOS licensed from Microsoft for use on the IBM PC system. Versions of PC-DOS paralleled that of MS-DOS up until version 6.1, where PC-DOS was independently maintained by IBM up until 7.1, the last version. Although not the only OS available for the IBM PC when it came out, it quickly became popular due to its low cost in comparison to the others. Its direct competitors on the PC at the time were CP/M-86 and UCSD p-System. The major differences between PC-DOS and MS-DOS were only in terms of driver support and built in programs until version 6.1 where development diverged.

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• 2000

PC-MOS (1987) 11 DOS

PC-MOS, released by The Software Link, was a multi-user multitasking OS that had compatibility with MS-DOS 5 applications and allowed users to connect to it via terminal.

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Professor DOS (1986) 0 Education DOS

Professor DOS, from INDIVIDUAL Software, is a friendly interactive training guide that helps you learn how to use DOS on your IBM PC or compatible computer.

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PTS-DOS (1995) 8 DOS

PTS-DOS is a Russian DOS clone created by the Russian company PhysTechSoft.

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Q-DOS (1989) 1 Utility DOS

Gazelle Systems Q-DOS is a text mode based file manager for DOS. Q-DOS is a simplified file manager that presents all DOS functions visibly. It competed against many other file managers including Norton Commander and Xtree

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RISC OS (1990) 3 Other

RISC OS is an operating system designed to run on the ARM chipset.

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SuperDOS (1991) 4 Other

BlueBird SuperDOS is a proprietary multi-tasking multi-user system built to run business applications simultaneously over dumb terminals, replacing expensive mainframe/minicomputers with a single commodity PC. Business Computers systems, and then IBM PC systems. It grew to support protected mode on 386/486 systems. Although it uses MS/PC-DOS to install, "Protected Mode SuperDOS is a freestanding operating system that is not dependent on either DOS or the ROM BIOS.". Most applications for it are written in BlueBird SuperDOS Business Basic. and moving-and-storage companies that needed workstations at many points for data entry, but did not want to put a powerful and expensive computer on every desk. Office, Manufacturing, Auto Rental, Van and Storage, Wholesale Distribution, and Word Processing. Most of these were ported from Data General compatible Business Basic software. multi user basic-oriented product was Thoroughbred/OS, and much later Citrix Multiuser attempted to fill a similar role.

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SY-TOS (1986) 0 Utility DOS

SY-TOS is a powerful backup program for DOS, and other operating systems. It was commonly customized for and bundled with OEM backup hardware. SY-TOS Plus was the first retail standalone version.

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Thoroughbred/OS (1987) 0 Other

Originally released in 1983 by Science Management Corporation and later under Concept Omega Corporation, Thoroughbred/OS is a unique BASIC oriented multi-tasking multi-user operating system for the IBM XT and compatible systems. serial terminals. It can power up to 16 terminals with the right serial expansion cards. All of the applications are written in BASIC, and the shell itself is an interactive BASIC interpreter.

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Timeworks DOS Office (1993) 1 Word Processor Spreadsheet Database DOS

Timeworks DOS Office, from Timeworks, Inc., is an office suite consisting of the Timeworks Word Writer PC word processor, the Timeworks SwftCalc spreadsheet, and the Timeworks Data Manager desktop database.

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Toolworks DOS Tutor (1990) 0 Education DOS

Toolworks DOS Tutor is an extensive DOS tutorial with detailed descriptions about the operation of common IBM PC compatibles, peripheral hardware, and the operation of DOS.

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Wendin DOS (1987) 5 DOS

Wendin DOS is a clone of MS/PC-DOS that runs on 8088 machines, but offers multitasking on 386+.

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Winchester Backup Utility For MS-DOS (1984) 0 DOS

This is a generic command line backup program provided by Texas Instruments for TI Professional Computers equipped with hard drives.

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WindowDOS (1987) 0 Utility DOS

WindowDOS is a pop-up TSR utility that enables DOS users to run DOS commands and perform file management while they are still running other applications. It can search for files, password lock a system, view files, and send special printer control codes to change printer text modes.

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Xerox 6060 Diagnostics 0 DOS

This is the diagnostics and GW-Basic disk bundled with Xerox 6060 IBM PC clones. these disks.

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Zenith MS-DOS Programmer's Utility Pack (1984) 0 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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Zenith Z-200 Diagnostics (1986) 0 DOS

These are a set of diagnostic programs for Heath/Zenith Z-200 computers.

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