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Macintosh Programmer's Workshop was the IDE created by Apple for writing applications for the Classic Mac OS. Not only does it contain a code editor and compiler, but it also comes with a shell with many UNIX-inspired utilities, such as make.
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.