Here's the section related to the OS/2 API implementation

• Architectural ideas behind OS/2 personality
• OS/2 personality prototype status
• Installable File System
• Installable Executable Format
• Command Line Reference
• Modules and their entry points
• Presentation Manager
• FreePM Documentation
• Build Level documentation
• IBM's OS/2 Toolkit and DDK documentation
• Family API
• VIO API
• CPI API
• main OS/2 server
• os2exec server
• filesystem server
• libKAL library
• DOSCALLS.DLL library
• Classic REXX