OS/2 1.x (1986) 37 OS2

OS/2 was originally a joint effort between IBM and Microsoft. It grew out of efforts to create a Multitasking MS-DOS. It was intended to be the future OS for IBM's new PS/2 series. At release it competed against Microsoft's Windows GUI shell, but most users continued to use DOS. OS/2 1.x was used as the basis for Citrix Multiuser | 1.x | 2.x | 3.x | 4.x | All |

• Pre-Release
• 1.0
• 1.1
• 1.2
• 1.3

OS/2 2.0 (1991) 8 OS2

OS/2 2.0 was a major change over OS/2 1.x. It was the first 32-bit OS/2 and built by IBM free of Microsoft's influence or contribution. It was the first to feature the new Workplace Shell GUI, and the first to be 32-bit. It was followed up by OS/2 Warp 3. | 1.x | 2.x | 3.x | 4.x | All |

• Pre-Release
• 2.0
• 2.1

OS/2 3.x (1994) 4 OS2

OS/2 3.0, marketed under the name "OS/2 Warp", reduced memory usage over OS/2 2.x and included Internet access software. The "Connect" version includes Ethernet networking and peer-to-peer file sharing. The "Blue Spine" editions bundle the Windows 3.1 files so no additional software is needed to use the Win-OS/2 subsystem. It was followed up by OS/2 Warp 4. | 1.x | 2.x | 3.x | 4.x | All |

• 3.0
• 3.0 PowerPC Edition

OS/2 Developer Connection (1995) 0 OS2

IBM's semi-often correspondence for OS/2 development.

• Vol. 8
• Vol. 12

OS/2 Warp 4 (1996) 102 OS2

OS/2 Warp 4 incorporated a number of new technologies over OS/2 Warp 3, such as Java, OpenGL, OpenDoc, and VoiceType. It also updated the appearance of the Workplace Shell. | 1.x | 2.x | 3.x | 4.x | All |

• OS/2 Warp 4.0
• OS/2 Warp 4.52

OS/400 (1994) 2 Other

OS/400 (now known as IBM i, previously i5/OS) is the operating system of the AS/400 (now Power Systems, previously System i) series of minicomputers by IBM. It is the replacement for CPF for the System/38 and SSP for the System/36. In addition to a consistent programming environment and a user-friendly interface, it features advanced features not seen in other platforms such as tagged memory, single-level storage, is exclusively written in managed languages.

• V3
• V4

OS2 Device Driver Pak (1996) 1 OS2

OS2 Device Driver Pak CD Volume 1.0 is a CD released by IBM to make installation of OS/2 Warp 4 easier.

• 1.0

Outside In (1991) 0 Utility DOS

Outside In, from Systems Compatibility Corp, is a TSR file viewer that can copy and paste blocks of text from documents in to DOS applications.

• 1.x

Overhead Express (1984) 0 Presentations DOS

Released in 1984 by Business & Professional Software, Inc, Overhead Express is a very early presentation program for the IBM PC that features high quality type, and an on screen print preview. It is geared towards overhead presentations, but can also be used for flyers, newsletters, report cover, labels, and more.

• 1.x

Packard Bell Navigator (1993) 1 Utility Other Windows DOS

Packard Bell Navigator is an alternate user interface that replaces the Windows 3.1 Program Manager shell. It presents the content of your computer as a series of rooms.

• 1.0
• 1.1
• 3.5
• 3.6
• 3.9

PageMaker (1987) 70 Publishing Windows OS2 MacOS

Aldus PageMaker, later Adobe PageMaker, is a desktop publishing program for Mac and Windows. First released in 1985, PageMaker was the first desktop publishing program for the Macintosh. It was followed over a year later with the release of 1.0 for the IBM PC. The PC version was a notable application as it was one of the few rare applications which would run under Windows 1.x. PC PageMaker 1.0 bundled a runtime version of Windows. This enabled MS-DOS users who had not decided to buy Windows to run PageMaker. Aldus skipped version 2.0 on the PC to bring version number in sync with the 3.0 Mac product.

• 1.00
• 1.0A
• 3.00
• 3.01
• 4.0
• 5.0
• 6.x

PageView (1988) 0 Word Processor Windows

Pageview is a tool to graphically display, manipulate, and print Microsoft Word 3.0 and 4.0 for DOS documents. This was released almost two years prior to Word 1.0 for Windows.

• 1.0

Paint Shop Pro (1990) 63 Graphics Windows

JASC Paint Shop Pro is a simple and easy to use bit-mapped graphics editor. It supports a wide variety of file formats, and photo manipulation functions that were comparable to PhotoShop. It has good support for editing 256 color palletized images that made it ideal for editing web graphics. It was first released in 1990 for Windows 3.0 as just "Paint Shop", and early versions gained popularity through the distribution of shareware releases. It lost popularity in 2003 when 8.0 was introduced with a redesigned UI and in 2004, JASC was acquired by Corel.

• 1.x
• 3.x
• 4.x
• 5.x
• 6.x
• 7.x

PaintShow Plus (1987) 0 Graphics DOS

Logetech's PaintShow Plus is a DOS based bit-mapped drawing program bundled with Logitech mice. Like ZSoft PC Paintbrush, Microsoft PC Paintbrush, and Mouse Systems PC Paint, PaintShow Plus clones the MacPaint user interface.

• 1.x
• 2.x

Palindrome Network Archivist (1993) 0 Server DOS

Palindrome Network Archivist is an enterprise server program to back up Novell NetWare servers onto tape drives.

• 3.0

PaperPort (1995) 0 Document Windows

PaperPort is a document management system frequently bundled with scanners. It can OCR scanned documents and convert them to PDF.

• 3.x

Paradise VGA Plus 16 Drivers (1988) 0 DOS Windows

Drivers for the Paradise Plus VGA card.

• 1.x

Paradox (1985) 4 DOS Windows

Originally released in 1985 by Ansa Software and later sold to Borland, Paradox is a high-speed relational database product that integrates with Borland's "Turbo" products. It was notable for its Query By Example feature, and its Paradox Application Language. It was popular in the late 80s and early 90s, and competed against database product such as dBase, Symantec Q&A, Foxpro, Clipper, Clarion, DataEase, R:Base, and DataFlex.

• 1.x
• 2.x
• 3.x
• Engine 2.0
• 4.0
• 1.0 (Win)
• 4.5
• 4.5 (Win)
• 5.0 (Win)
• 7.x (Win)

Parsons Atomic Clock (1999) 0 Utility Windows

Parsons Atomic Clock is a fancy utility for synchronizing your computers clock with a time server, either via modem or to an internet time server. Features include an audio spoken clock, time drift estimates, daytime map, lunar phase events, and customizable time counters.

• 5.0

Parsons MoneyPlans (1989) 0 Financial DOS

MoneyPlans consists of a series of financial calculations intended to assist you in planning your personal financial situation. This includes calculations for Life Insurance, Disability Insurance, Education, Retirement, Cash Vs Loan, Leas Vs. Loan, Adjustable Rate Loan, Loan Comparison, CD Comparison, Bond Volatility, and Discount Feasibility.

• 1.x

Partition Commander (1988) 0 Utility DOS

Partition Commander is a Wizard based partition and disk utilization tool. It supports FAT, FAT32, NTFS, HPFS, and some Unix file systems.
It runs in real-mode DOS and installs from only two floppy disks. It competed directly against Partition Magic. Memory Commander, a 386 Expanded/Extended Memory Manager.

• 1.x

Partition-It (1996) 0 Utility Windows

Partition-It, from Quarterdeck, is a partitioning tool that features a native Windows 95 32-bit application. It was later acquired by Symantec. Partition-It competed against Partition Magic.

• 1.0

PartitionMagic (1995) 9 Utility DOS Windows

A tool from PowerQuest, and later Symantec, that enables manipulation of partitions through its own bootable media. PartitionMagic can shrink, grow, or move partitions without the need to backup and restore files in that partition. It supported a variety of file systems, and the core DOS-based parition tool fit on a bootable 1.44mb floppy disk. It was extremely popular, and made installing or removing multiple OSes much easier.

• 2.x
• 3.x
• 4.x
• 5.x
• 6.0
• 7.x

Pascal/MT+ (1981) 0 CPM DOS

Pascal/MT+ is an ISO 7185 compatible Pascal compiler sold by Digital Research as part of their CP/M product line. There were versions for CP/M-80, CP/M-68k, CP/M-86, and MS-DOS.

• 5.x (CPM)
• 3.x

PasteUp (1992) 0 Publishing Unix

PasteUp is a text processing system that can arrange columns of text, provide typographical control, draw shapes, and other effects.

• 2.0
• 2.5