- 3do: The main headers for Portfolio, Lib3DO, and other original SDK libraries. Cleaned and restructured for 3DO-DevKit.
- 3dosdk: The original headers from different SDKS. Unused. For reference.
- community: Headers for any included modern community libraries.
- ttl: "trapexit's template library". A simple work in progress replacement for C++ STL.
- rwstl: Original RogueWave STL headers from ARM C++ compiler. Unused. For reference.