PC-DOS (1981) 63 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
• 2000

PC/DACS (1995) 0 Utility OS2

PC/DACS is a system utility that adds password protected access control to a computer. It support session timeout, usage time restrictions, boot protection, system drive encryption, and GUI tools for all administrative tasks.

• 2.x

PDC Prolog (1990) 2 DOS

PDC Prolog, by Prolog Development Center, is an enhanced implementation of the Prolog language (a language associated with artificial intelligence development). Some early versions were marketed and published by Borland under the name "Turbo Prolog".

• 3.x

Plus Hardcard (1987) 0 DOS

These are the software tools and drivers needed to install and operate a Plus 20 Hardcard internal hard drive.

• 1987

PolyWindows DeskPlus (1985) 0 Utility DOS

PolyWindows DeskPlus is a collection of memory resident accessories for DOS. It was first released in 1984 by POLYTRON Corporation. It includes an editor, index cards, a calendar/appointment book, an alarm clock, several calculators, a phone dialer, DOS functions, keyboard macros, and can cut-and-paste between applications. HQ, Mastro, PC Desk, Pop-Up Desk Set, and WordPerfect Library.

• 1.2

Popcorn Desktop (1986) 1 Utility PIM DOS

Popcorn desktop is a set of TSR utilities similar to Borland Sidekick. It includes a text editor, a calculator, and a calendar. It can copy information from currently running programs displayed on the screen.

• 1.x

Popcorn Misspeller's Dictionary (1988) 0 Word Processor Utility DOS

Popcorn Misspeller's Dictionary, from Popcorn Software, is a TSR program with a popup list of commonly misspelled words. You may find a word by typing it, but it does not make corrective suggestions.

• 1.x

PractiWord (1986) 0 Word Processor DOS

PractiWord is an easy to use word processor that works similarly to WordStar and integrates with PractiCorp's PractiBase database and PractiCalc III spreadsheet. It was lower cost than WordStar and was primarily targeted at home users and small businesses. Supports the IBM PCJr.

• 1.x

ProCalc 3D (1992) 0 Spreadsheet DOS

ProCalc 3d is a low-cost spreadsheet created by Formalsoft and sold by Parsons Technology.

• 1.x

Prodigy (1988) 0 Communications DOS

Prodigy was an online service that offered on-line news, forums, stock information, games, banking, online shopping, and e-mail. Its primary feature was that it used a fully graphical user interface, however it was limited to very low resolutions and slow dial-up speeds, making it impractical for displaying photographs or detailed graphical documents.

• 2.x

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.

• 2.x

Professor WINDOWS (1990) 0 Education DOS

Professor WINDOWS, from INDIVIDUAL Software Incorporated, was a best selling Training program for and about Microsoft Windows 3.0. There was also a "Professor DOS"

• Win 3.0

Proteus Design Suite (1992) 0 Engineering DOS

Proteus Design Suite is a circuit design and simulation program.

• 2.20

PTS-DOS (1995) 0 DOS

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

• 7
• 2000

Q-DOS (1989) 0 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

• 2.x
• 3.x

QEdit (1990) 0 Editor DOS

SemWare's QEdit is a powerful, highly responsive, and scriptable text-mode editor. It was also distributed as shareware. It competed with programs like Borland Brief.

• 2.1
• 3.0

Qmodem (1992) 1 Communications DOS

Qmodem was a friendly, well designed, and feature rich, commercial telecommunications program that was also distributed in shareware form. The first release was in 1984 by John Friel III, and sold to Mustang Software in 1991. During the early years, it competed with PC-Talk. During the later years, it competed with Procomm and Telemate.

• 4.5 (DOS)
• PRO 1.0 (DOS)

QuadMaster (1983) 2 DOS

QuadMaster is a set of utilities for use with Quadram memory expansion cards. MasterCache, MasterSpool, and QuadRAM Drive. And QuadMaster II is menu-oriented, making it easy to use.

• I
• II

Quadram Quadcolor (1984) 0 DOS

These are the manuals and installation program required to use the extended modes on a Quadram Quadcolor I and II board. Georgia, is a CGA compatible ISA video card for IBM PCs and clones that provides enhanced capabilities over that of IBM CGA.

• 1984

Quadtools - Quadtel 386 RAM Utilities (1989) 0 DOS

A collection of memory management tools for 386 computers. Includes expanded memory manager, RAM disk, spooler, and cache software.

• 1.x

Quarterdeck GameRunner (1995) 0 Utility DOS

Quarterdeck GameRunner, from Quarterdeck Corporation, is a specialized packaging of their QEMM memory management product that is specifically designed to automatically maximize the memory and speed available to known games. DOS based games of the time used a hodgepodge of memory access methods, that varied from product to product and often created conflicts. GameRunner attempts to mitigate some of this chaos by providing automatic configuration and management.

• 2.x

Quarterdeck Manifest (1988) 0 Utility DOS

Manifest is an easy to use diagnostic program that provides incredibly detailed information about DOS resource usage, loaded programs, IO devices, and memory usage including EMS, XMS, and UMB memory. It was available as a standalone program and bundled with QEMM and Deskview. Tools like this were essential for resolving compatibility problems between poorly behaved DOS programs and highly customized environments, especially in task switched or multitasking environments.

• 1.x

RapidFile (1987) 0 Database DOS

Rapidfile is an easy to use and flexible flat-file database with an integrated word processors. It supports customizable data views and reporting. It was aimed at those who need databases for simple tasks for which relational databases would be an overkill.

• 1.0

ReadRight (1989) 0 Document DOS

ReadRight 2.0 is a software OCR application for IBM PC computers. It has built in support for a number of scanners, and can OCR from existing graphics files. It recognizes a number of different fonts, font sizes, supports text columns, and can output to a number of different formats. time, other OCR tools used specialized hardware accelerator cards to achieve acceptable performance.

• 2.0

Relay Gold (1988) 0 Communications DOS

Relay/PC Gold is a powerful telecommunications program targeted at corporate users. It supports multiple communications sessions, scripting, file transfers, IBM 3270 connectivity, DEC Terminal emulation, and TCP/IP connectivity.

• 3.0