Geoworks SDK (1984) 0 DOS

These are the tools needed to develop GEOWORKS application software.

• 2.x

Microsoft OS/2 SDK (1987) 3 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

Microsoft WinPad SDK (1994) 0 Windows

WinPad is a Personal Information Manager designed for part of a "non-dos" x86 based PDA operating system with a Win API set. The WinPad project was later abandoned in favor of the 32-bit Windows CE.

• 1.x

Windows SDK & DDK (1986) 62 Windows DOS

The Microsoft Windows Software Development Kits (SDK) provide sample program code, extra libraries, and documentation to aid application developers producing Windows applications. Microsoft Windows Driver Development Kits are similar sets of samples and libraries but specific to device driver development, and much more in-depth.

• Windows 1.x
• Windows 2.x
• Windows 3.0
• NT 3.x
• Windows 3.1
• WfW 3.11
• Windows 95
• NT 4.0
• XP (NT 5.1)
• 2003 (NT 5.2)