MS-DOS (1981) 1672 DOS

Originally 86-DOS, written by Tim Paterson of Seattle Computer Products, DOS was a rough clone of CP/M for 8086 based hardware. Microsoft purchased it and licensed it to IBM for use with Microsoft's IBM PC language products. In 1982, Microsoft began licensing DOS to other OEMs that ported it to their custom x86 hardware and IBM PC clones.

• 7.1 (CDU)

PC-DOS (1981) 182 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.

• 2000

WordPerfect (1983) 99 Word Processor DOS

During the late 1980's, WordPerfect was THE standard word processor for DOS based PCs in big business. Under DOS, it competed mostly against Wordstar. WordPerfect for Windows enjoyed some success in the early Windows environments, but was quickly displaced by Microsoft Word for Windows. Later Windows versions were part of Borland Office/Novell PerfectOffice/Corel Office/Corel WordPerfect Office.

• 7.x (Unix)

DESQView (1984) 21 Utility DOS

DESQView, from Quarterdeck, was a DOS application multi-tasker and in later versions functioned as an X client for applications on remote UNIX systems. It competed against IBM Topview. The original DESQ was just a task switcher, but subsequent versions offered preemptive multitasking of well behaved DOS programs on real-mode 8088 PCs. It gained popularity when DESQView 386 added virtual x86 support. This enabled the ability to multi task many poorly behaved programs, and was often used on BBSes due to its excellent COM port handling. It was later overtaken by OS/2 and Windows.

• DESQView X 2.x

Microsoft Mouse (1984) 49 DOS Windows

These are drivers provided by Microsoft for the Microsoft BusPort, serial, and PS/2 mice. Introduced in 1983, The Microsoft Mouse is historically important as it was one of Microsoft's earliest hardware products (The other being an Apple II Z-80 CP/M card). The first Mouse for the IBM PC was actually from Mouse Systems, not Microsoft. However, most clone mice emulated Microsoft's serial protocol and DOS driver software interface. The first Microsoft application designed to make full use of the mouse was Microsoft Word for DOS, and they hyped a product called "Microsoft Windows" (not released until several years later) that was to compete against the upcoming Apple Macintosh and the Mouse Systems based Viscorp Visi On.

• 11.x

Norton Commander (1986) 127 Utility DOS

Norton Commander is a MS-DOS based file shell that was widely popular due to it's two column design. You could easily copy and move files between one folder or another, execute DOS commands and more. It competed against many other file managers including Gazelle Q-DOS and Xtree

• 5.x
• 5.5x

Quattro Pro (1987) 16 Spreadsheet DOS

Quattro Pro, initially just named "Quattro", is a spreadsheet application from Borland International. It competed against Lotus 1-2-3 and Excel, and had several advantages including tabbed sheets, and the ability to handle up to a million rows. Quattro Pro was the subject a lawsuit by Lotus, simply because because Quattro Pro copied their menu user interface, but Lotus claimed this was not allowed. This also affected The Twin and VP-Planner.

• 5.6 (DOS)

Ontrack Disk Manager (1987) 4 DOS

Ontrack Disk Manager is a BIOS overlay and partitioning tool that helps you overcome various BIOS hard drive size limits. It was commonly bundled with hard drives.

• 7.x
• 8.x
• 9.x

Logitech Mouseware (1987) 8 DOS Windows

Logitech mice and pointing devices were popular competition to Microsoft or Microsoft clone mice. Logitech mice often had extra features that required Logitech drivers, and early Logitech mice were not Microsoft or Mouse Systems protocol compatible.

• 7.x
• 8.x

SpinRite (1988) 17 Utility DOS

SpinRite, by Gibson Research, is a tool that can diagnose, repair, and rejuvenate the low-level formatting and optimize the interleave of MFM and RLL (ST412/506 interface) hard disk drives. Its pattern testing ability is also useful for verifying the operation of SCSI and IDE hard drives.

• 4.x
• 5.0

Watcom C/C++ (1989) 11 DOS Windows

The Watcom C/C++ is a powerful compiler for DOS, Windows, and OS/2. Its key selling point was superior cross platform support. It supported DOS, extended DOS 32-bit, Win16, Win32, and OS/2. Notably, it was used to produce the video game DOOM as a 32-bit DOS extended program.

• 10.5
• 11.0

Borland Turbo Assembler (1989) 75 DOS Windows

Turbo Assembler is an x86 16-bit assembler from Borland. It competed against, and was often cited as faster than Microsoft Macro Assembler.

• 5.x

Managing Your Money (1989) 7 Financial DOS

Managing Your Money is your easy-to-use personal finance manager. MYM has all you'll need to take control of your finances. You can automate your checking account, track credit investments, reduce your debts, plan your savings, decide whether to refinance your mortgage, and much more. You don't have to use all this at first or ever. But it's nice to know its all here when you need it. It is sometimes titled as "Andrew Tobias' Managing Your Money".

• 12.0

Clarion (1989) 11 Database DOS

Clarion is an advanced user friendly 4GL DBMS and programming environment for DOS and Windows. It boasted the ability to greatly reduce application development time, featured highly integrated visual creation tools, and a powerful set of program functions.

• 3.1 (DOS)

DR DOS (1990) 70 DOS

DR DOS is an MS-DOS compatible operating system from Digital Research that evolved from their earlier CP/M-86 based products Concurrent DOS and DOS Plus.

• 8.x

QEMM (1990) 32 Utility DOS Windows

Quarterdeck QEMM is a DOS Extended Memory Manager for 386+ computer which allows you to make use of memory beyond the 640kb barrier. It can also be used with QRAM, a utility for freeing up the 640k base memory.

• 8.x
• 9.x

LANtastic (1990) 12 DOS Windows

Lantastic is an easy to use, low cost networking system targeted at small networks and home users. It was very popular and highly rated in the early 1990s. Unlike most LAN networking software of the time, Lantastic required only installation and minimal, straightforward, configuration. Lantastic gives users the ability to share printers and files on a hard drive or CD-ROM. It is considered a "peer-to-peer" network, as there is no need for a dedicated server. Any computer may be configured as a server as well as a client. Lantastic was also very memory efficient, using minimal DOS memory in both workstation and sever modes, enabling users to run most popular DOS applications while Lantastic was running. Lantastic supported Ethernet, ARCNET and Token Ring networks. Artisoft also sold networking kits that included both network adapters and the Lantastic software. Lantastic was avaialble for DOS, Windows, and OS/2. At the time it competed against Novell Netware Lite, and many other small LAN oriented products.

• 7.0

Sound Blaster Drivers (1990) 75 DOS Windows

The Sound Blaster is a series of sound cards from Create Labs. For a time, the Sound Blaster was considered a de-facto standard for DOS based gaming. Initially it competed against the uncommon IBM Music Feature card, and the Adlib cards. The original sound blaster provided 8-bit mono digital sound in addition to Adlib-compatible FM music synthesis and stereo CMS Game Blaster compatible square-wave music. Most DOS games work best with the earlier ISA cards. Later PCI cards use completely different hardware and only provide Sound Blaster compatiblity through software emulation.

• Sound Blaster AWE32
• Sound Blaster AWE64

pcANYWHERE (1990) 9 Communications DOS Windows

pcAnywhere is a tool that enables one to remotely control another computer, or to be remotely controlled.

• 2.0 (Win)
• 8.0 (Win)

QuickLink (1990) 6 Communications DOS Windows

Quick Link Fax, from Smith Micro Software, is a program for receiving and sending Faxes under DOS and Windows 3.1 with a compatible FAXModem. It competed against Delrina WinFax. On the Macintosh, Smith Micro provided MacComCenter.

• II 3.2 (Win)

PowerBASIC (1991) 13 DOS

PowerBASIC is a continuation of Borland TurboBasic maintained by its original author, Robert S. Zale. It was originally notable as a BASIC compiler, when most BASIC environments were interpreted.

• 3.x

ToyBox Menu Manager / Magic Desk (1992) 3 Utility DOS

ToyBox II, later renamed to Magic Desk, is a simplified graphical menu system that lets you launch your DOS applications from a selection of tiled iconic buttons. Supports nested hierarchies, includes an icon editor, and a number of common icons.

• 3.x (Magic Desk)

Qualitas 386MAX (1992) 10 DOS

Qualitas 386MAX is a memory manager that competed with Quarterdeck QEMM and Memory Commander. It features ease use, with automated configuration and optimization. It claims to make more DOS memory available than other similar tools at the time.

• 8.x

Peachtree Complete Accounting (1992) 7 Financial DOS

Peachtree Accounting was originally created in 1975 by an Altair dealer, The Computer SystemCenter, in Atlanta, Georgia to help sell Altair computers. That possibly would have made it the first accounting package for personal computers.

• 9.00 (DOS)

Adaptec EZ-SCSI (1992) 13 DOS Windows

EZ-SCSI, from Adaptec, is a convenient all-in-one set of drivers for Adaptec SCSI cards.

• 4.x
• 5.x