Presentation Task Force, from New Vision Technologies, is a collection of clipart for DOS and Windows. It was highly rated by PC Magazine.

Print Magic is a sign, card, and banner printing program, similar to Print Master. Compared to others of the time, its functionality is rather crude, lacking previews or undo.

Print Master was another sign and banner creation program similar to The Print Shop. The earlier version got in to trouble for looking too much like the Print Shop.

PrintPower is a tool for creating greeting cards, signs, banners, and calendars, similar to The Print Shop. It was a rather clunky low-end bottom of the bargain-barrel budget title. The later "Pro" version seems to give it a more Mac-like user interface.

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

ProComm, from Datastorm technologies, was a powerful and very popular telecommunications program for DOS and Windows. TERMULATOR, written to fill the gap left by shareware PC-Talk when its author died. protocols for uploading and downloading, and automatic redial. The commercial "ProComm Plus" includes a scripting language, more terminal types, additional file transfer protocols, context sensitive help, support for 8 COM ports, and a professionally written manual (telecommunications)](/product/microsoft_access_business_information_access_program), Crosstalk, Relay Gold, and PFS Access. Later, it competed with QModem and Telemate.

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.

Professional Write, from Software Publishing Corporation, was a popular word processor for home use during the late 80s and early 90s. It features an easy to use menu system and an integrated spell checker. Professional Write was a revamp and replacement for SPC's earlier PFS:Write.

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.

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"

Project Manager Workbench, later just called Project Workbench, is a powerful, full featured, professional project management program for DOS. At the time, it was also very pricey.

Prokey is a DOS TSR macro recording and playback program. It adds lotus-style menus to applications, lets users create their own help messages, can copy text from the screen, remembers the last 300 keystrokes, and supports timed reminder alerts.

Protec is a DOS menu shell that restricts access of files and programs to specific users. It hides files so they can not be easily seen by unauthorized users, includes encryption tools, and features access audit logging.

Proteus Design Suite is a circuit design and simulation program.

Publish-It! is a WYSIWYG desktop publishing tool originally created by the UK based GST Software for the TOS/GEM Atari ST system. There were versions for IBM PC/GEM, Apple II, Macintosh (as "Publish-It! Easy"), and later Microsoft Windows. desktop publishing tools, it is not a full word processor, but rather imports text and focuses on high-quality formatting and printing. budget title for home users. SoftKey also released a version branded as Key Publisher

Publisher's Paintbrush is the premium version of ZSoft PC Paintbrush. It includes enhanced features targeted at desktop publishers. Features include enhanced fonts and zooming.

Pyro, from Fifth Generation Systems, is a commercial set of screen savers that started of as a simple black and white fireworks screen saver on the Apple Macintosh. It competed against AfterDark.

Symantec Q&A is a low end flat-file database manager that includes a word processor and a natural language query and reporting interface. While the package is forms-based like Professional File, it is more sophisticated and powerful. Symantec also sold a companion word processor called Q&A Write.

Q&A Write is a word processor designed to accompany Symantec's Q&A database software product. Q&A Write is designed to resemble PFS:Write, and excelled in the areas of ease of use and laser printer support. It also includes mail-merge, keyboard macros, math calculations, envelope printing, spell-checking, and a Lotus 1-2-3 interface.

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

QAPlus is an extensive set of tools to test the functionality of a PC, measure performance, and optimize the configuration. It can test motherboard resources, RAM, video cards, I/O ports, and floppy drives. Later versions supported Microsoft Windows. It competed with tools like Checkit and AMI Diagnostics.

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.

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.

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.

QRAM is a memory management tool for 8088, 8086, and 286 based PCs. It can work with LIM 4.0 EMS memory cards, shadow RAM, and even VGA memory to free up or add to the base 640k memory. It also provides XMS compatible extended memory services, so it can replace Microsoft's himem.sys.