GEOS/GeoWorks (1991) 12 DOSShell

GeoWorks is a graphical environment and application suite for DOS. GEOS for the IBM PC (PC/GEOS) was a huge advancement over the earlier-8 bit Apple II and Commodore 64 GEOS products. Although the PC versions runs on top of DOS, it is sometimes considered an Operating System. Notably, PC/GEOS was used as a graphical runtime for the America Online DOS client. The GeoWorks suites include the applications GeoWrite, GeoDraw, GeoManager, GeoPlanner, GeoDex, and GeoComm. GeoWorks later became NewDeal Office and then Breadbox Ensemble.

• 1.x
• 2.x

IBM OS/2 LAN Server (1990) 2 DOS OS2

IBM LAN Server is a powerful print and file server system with many advanced features for the OS/2 operating system. It supports both OS/2 and DOS clients. It was a close cousin to Microsoft LAN Manager, which became a core component of Windows NT.

• 1.x
• 3.x
• 4.x

IBM Professional Developers Kit for OS/2 (1992) 1 OS2

The IBM Professional Developers Kit for OS/2 CD contains OS/2 code with the latest fixes, 32-bit graphics engine, support for Microsoft Windows 3.1 programs, online libraries, network code, and tools. This software is intended for use with IBM OS/2 2.0.

• 10-1992

IBM TCP/IP for OS/2 (1992) 0 OS2

The IBM TCP/IP for OS/2 product provides basic TCP/IP networking support for the IBM OS/2 operating system. Numerous additional "kits" were available that added additional application or networking functionality on top of the IBM TCP/IP product..

• 1.x
• 2.x

Microsoft OS/2 Programmer's Toolkit (1988) 0 OS2

The Microsoft OS/2 Programmer's Toolkit 1.0 contains advanced OS/2 1.0 API sample code and documentation for use in conjunction with Microsoft's high-level programming products, sold separately. Software Development Kit, which bundled programming language support and pre-release components.

• 1.0

Microsoft OS/2 SDK (1987) 0 DOS OS2

The Microsoft OS/2 SDK includes pre-release builds of OS/2, beta development tools, sample code, and loads of documentation. These were released prior to the OS/2 1.0 and 1.1 releases. Microsoft charged $3,000 in 1987 for the SDK. It was criticized as overpriced, buggy, and slow.

• 1.00-1.01
• 1.02
• 1.03
• 1.04
• 1.05
• 1.06
• 1.10
• 2.0

OS/2 1.x (1986) 41 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) 50 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) 60 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) 172 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