PC-DOS (1981) 112 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-File (1984) 1 Database DOS

PC-File is a simple flat file database management program for DOS. PC-File, along with PC-Write, and PC-Talk were the first popular products sold under the "Shareware" concept.

• III 2.0
• III 4.0
• Plus
• 5.x
• 6.x
• 7.x

PC-Fullbak (1988) 0 Utility DOS

PC-Fullbak was a small low-cost hard drive backup program that aggressively competed head-on against Fifth Generation Systems Fastback. It was comparatively speedy, and supported appending to existing backups. under the name "PC-FullbakEZ". There were also versions for the Macintosh.

• 2.x

PC-Link (1988) 0 Communications DOS

This is the client software used to communicate with Quantum Computer Service's PC-Link service. PC-Link followed the success of Quantum's Q-Link service for the Commodore 64. PC-Link was the predecessor to America OnLine.

• 1988

PC-MOS (1987) 0 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.

• 1.x
• 2.x
• 3.x
• 5.x

PC-NFS (1994) 0 DOS

PC-NFS, from SunSelect/SunMicrosystems is an enterprise-grade NFS client and utility set for Microsoft Windows. NFS is a primitive TCP/IP network file sharing system used by Unix systems. UNIX systems, VMS minicomputers and IBM mainframes. It also include telnet and Unix printing support.

• Pro 2.x

PC-Type (1991) 0 Word Processor DOS

PC-Type is a bare bones, budget oriented, word processor. PC-Type, along with PC-File were among the first popular products sold under the "Shareware" concept.

• 4.x

PC-Write (1984) 4 Word Processor DOS

PC-Write, written by Bob Wallace of Quicksoft, was an editor for the PC and along with PC-File and PC-Talk was one of the first widely distributed shareware programs.

• 2.4
• 2.7

PC-Xview (1992) 0 Communications DOS

PC-Xview is a mature X Windowing program for DOS. It supports a wide variety of DOS network clients

• 4.0

pcANYWHERE (1990) 1 Communications DOS Windows

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

• 2.x (DOS)
• 4.0 (DOS)
• 4.5 (DOS)
• 5.0 (DOS)
• 2.0 (Win)
• 8.0 (Win)

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

Peachtext 5000 (1983) 1 Word Processor Financial Database DOS

PeachText 5000 is a complete personal productivity system for word processing, financial modeling, mailing lists and simple database management. It contains a thesaurus, spell checker, and file conversion tools.

• 2.x

Peachtree Complete Accounting (1992) 0 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.

• 6.00 (DOS)
• 8.00 (DOS)
• 9.00 (DOS)

Peachtree Inventory Management (1984) 1 Financial DOS

Peachtree Inventory Management is a business accounting tool for tracking sales inventory.

• 1984

Peachtree Mailing List Manager (1982) 0 Utility CPM

Peachtree Mailing List Manager, from Peachtree Software Incorporated, is a mailing list manager included with Peachtree software bundles.

• 1

Perceive Personal (1993) 0 Publishing DOS

This is an early OCR program for DOS based computers.

• 1.1 for DOS

Perfect Calc (1983) 3 Spreadsheet DOS

Perfect Calc, from Perfect Software, Inc, is a VisiCalc-like spreadsheet for DOS. It was somewhat of a budget product, and bundled with a number of CP/M and DOS systems.

• 1.15

Perfect Filer (1983) 1 Database DOS

Perfect Filer, from Perfect Software, Inc, is an easy to use database for DOS bundled with a number of early DOS and CP/M computers. "Perfect Filer is designed to assist you in the effective management of information. Essentially Perfect Filer allows you to build a computerized records management system where data on clients, customers or other case records can be stored . No more typing and retyping the same information, searching through file drawers, or hand copying or typing information stored in a file . With Perfect Filer your computer can do these tasks and more . You enter information in the file only once, Perfect Filer retrieves it, prints it where and how you want it-on invoices, shipping labels, monthly statements, form letters, etc . Perfect Filer's uses in the modern office are unlimited."

• 1.23

Perfect Link (1983) 1 Communications DOS

Perfect Link, from Perfect Software, Inc, is a rudimentary terminal telecommunications program for DOS.

• 1.00

Perfect Writer (1983) 1 Word Processor DOS

Perfect Writer, from Perfect Software, Inc, is a simple word processor for MS-DOS and CP/M-80 systems. It was bundled with many 8-bit CP/M systems and some early MS-DOS and IBM PC compatible computers. It was generally considered a low end entry-level product, but it was designed with portability in mind.

• 1.x

PFS Access (1984) 1 Communications DOS

PFS Access is an easy to use, but rather basic, telecommunications program designed to fit in with the low cost PFS series products. It lacks many features found in more professional products.

• BXX

PFS First Choice (1987) 3 Word Processor Spreadsheet Presentations Database DOS

PFS First Choice is a simple, easy to use integrated office suite marketed towards new users. It includes a word processor, spreadsheet, graphics, database, and telecommunications. First Choice is similar to, but not as feature rich as, the standalone PFS office products. It competed against AlphaWorks/LotusWorks and Microsoft Works.

• 1.x
• 2.x
• 3.x

PFS First Graphics (1988) 0 Presentations DOS

First Graphics, from Software Publishing Corp, is a business graph plotting program. It is similar to, but not as full featured as Harvard Graphics. Earlier version were known as PFS:Graph

• 1.00

PFS Preface (1990) 0 Utility DOS

PFS Preface is a menu system and file manager for DOS that uses an interface style similar to other PFS products.

• 1.00

Pinball Construction Set (1983) 3 DOS

Originally for the Apple II, Pinball Construction Set is a pinball game that lets you create your own custom pinball table game layouts. It was one of the earliest programs to popularize the use of drag-and-drop. There were versions for the Apple II, C64, Atari Home Computer system, IBM PC, and Macintosh.

• 1