PC-DOS (1981) 210 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.

• 4.x
• 5.x

PC-File (1984) 0 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.

• 5.x
• 6.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) 7 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.

• 2.x
• 3.x

PC-Type (1991) 1 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-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

PC/IX (1984) 2 Unix

Interactive UNIX, also known as PC/IX, and 386/ix were UNIX derivitives created for the IBM PC in the early 1980's. PC/IX was the first UNIX sold directly from IBM, but not the first UNIX sold for the IBM PC. (Venix/86 was the first.) The original PC/IX software sold was on 19 floppy disks and sold for 900 dollars. In 1985, 386/ix was introduced, later named Interactive UNIX. The last version released was 4.1.1 in July 1998 and was supported up until 2006.

• 2.x

pcANYWHERE (1990) 0 Communications DOS

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

• 4.0 (DOS)
• 4.5 (DOS)

PDC Prolog (1990) 0 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

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)

Personal Newsletter (1988) 0 Publishing Other

Personal Newsletter is a simple desktop publishing tool for the Apple II.

• 2.0

Persuasion (1991) 0 Presentations Windows

Aldus Persuasion is a presentation and slide creation program. "With the support that Persuasion offers - professional quality slides, overheads, handouts, and speaker notes - you can deliver your presentation with more confidence and ease than ever before." After version 2.x, Persuasion was purchased by Adobe.

• 2.x

PFS First Choice (1987) 1 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.

• 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 First Publisher (1988) 0 Publishing DOS

First Publisher, from Software Publishing Corporation, is a WYSIWYG desktop publisher for DOS that excels at producing extremely high quality text and graphics print even using dot-matrix printers. This program originated as T/Maker Clickart. In 1991 Software Publishing Corp sold their PFS series to Spinnaker Software, where it became Easy Working Desktop Publisher.

• 2.0
• 2.01 for DeskMate
• Art
• 3.0

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

PFS Professional File (1986) 1 Database DOS

PFS Professional File is an easy to use flat-file database for DOS. It is a combination of the earlier PFS:File and PFS:Report products.

• 2.0

PFS:Business Plan (1992) 0 Document Windows

PFS:Business Plan is a business management program specifically tailored for creating company business plans. This involves market analysis, business forecasting, sales forecasts, balance sheets, cash flow, etc.

• 1x

PFS:WindowWorks (1991) 1 Word Processor Spreadsheet Presentations Communications PIM Database Windows

PFS WindowWorks, from Spinnaker Software and Ancier Technologies, is an integrated all-in-one office application that includes a word processor, spreadsheet, chart editor, telecommunications, database, label maker and address book. Supposedly it was the first of such office suites for Windows 3.0, but soon competed with Microsoft Works for Windows. for Windows"](/product/better-working-eight).

• 1.x

PFS:Write (1983) 9 Word Processor DOS

PFS:Write, originally from Software Publishing Corporation and later sold to Spinnaker Software, was an early and easy to use word processor for the IBM PC and Apple II. It was also licensed by IBM as IBM Writing Assistant. It can exchange data between PFS:Graph, PFS:File, and PFS:Report. SPC later replaced PFS:Write with Professional Write. Early versions had no built in spell checker, and were instead used with PFS:Proof.

• 2.x

PhotoFinish (1992) 0 Graphics Windows

PhotoFinish is an image editor that features a number of effects geared towards photo touch-ups or enhancements. It also supports acquiring images from a scanner. It was produced and sold by ZSoft, who earlier created PC Paintbrush. PhotoFinish somewhat resembles PC Paintbrush, but has many more features. After SoftKey bought out ZSoft, they rebranded this product as "PC PaintBrush 1.0" and sold it a a budget title.

• 1.0

Photoshop (1988) 59 Graphics MacOS Windows

Photoshop is a powerful drawing and photo manipulation program for both Mac and Windows. The Macintosh version was released by Adobe in 1990, although a very small number were bundled with Barneyscan slide scanners prior to that. Photoshop contained many advanced features including layered images, advanced color control, and plug-ins. Prior to its release, many of its features were only found in high end dedicated photo pre-processing systems.

• 0.x (beta)
• 1.x
• 2.x

PKZip (1990) 19 Utility DOS

Pkzip is the most common archiver for MS-DOS based systems. It implements a an open compression method and is much faster than other archivers of its time.

• 1.x
• 2.0x

PlanPerfect (1987) 0 Spreadsheet DOS

PlanPerfect, originally called MathPlan, is a spreadsheet and graphing companion to WordPerfect. It supports the same printers as WordPerfect and is optimized for lower-end machines. PlanPerfect was mainly targeted at existing WordPerfect users. also enjoy PlanPerfect.

• 5.x