PC-DOS (1981) 170 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.

• 1.x
• 2.x
• 3.x
• 4.x
• 5.x
• 6.x
• 7.x

Slidewrite Plus (1985) 2 Presentations Graphics DOS

Slidewrite Plus is an easy to use general purpose business graphing and slide making program. It supports the usual bar, line, scatter, ,area, mixed hi-low, and pie charts. It competed against graphing programs like Harvard Graphics and Freelance.

• 1.10

StarProof Bridge (1984) 1 Word Processor Utility DOS

The StarProof Bridge is a utility that enabled IBM Word Proof to work with WordStar documents.

• 1.00

TopView (1985) 11 Utility DOS

Released by IBM in 1984, TopView was a text-mode windowed multitasker for the IBM PC, XT, and AT computer. It featured preemptive multitasking, text-based windowed task sessions, overlapping windows, and supports the use of a mouse. In part, it was one of the reasons why overlapping windows were added to Microsoft Windows 2.0. TopView was later overtaken by DesqView, OS/2, and Windows. For more information, see the Topview 1.00 Software Spotlight.

• 1.x

Xenix (1984) 23 Unix

Xenix was the variant of UNIX originally published by Microsoft, later sold to SCO. It added a variety of technical enhancements over System V Unix, including a menu-driven business shell. It was ported to many different platforms from a PDP-11 including the Altos 8600 (First x86 port), IBM PC, Intel System 86, TRS-80 Model 16, SCP Gazelle II, and Apple Lisa. The Xenix Software Development System, Microsoft Multiplan 2.x and Microsoft Multiplan 3.x, Microsoft Word 3.0 and Microsoft Word 5.x, and FoxBase Plus 1.00

• IBM PC 1.00

Xenix Software Development System (1983) 1 Unix

The Xenix Development System is a set of compiler and code tools for the Xenix operating system.

• 1.00 (IBM)
• 2.00 (IBM)