Microsoft OS2 Programmers Toolkit 1.0
Released in 1988 by Microsoft
For Microsoft OS/2 and Microsoft C

The 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.

It was intended as a lower cost alternative to Microsoft's OS/2 
Software Development Kit, which bundled programming language support 
and pre-release components.
