This drawer contains AB3-resourcefiles called "Residents".

Resident file are repositories that stores 
- Macros,
- Konstants
- Newtypes

They may be compared to header-files (e.g. intuition.h) in C/C++

Most common Residentfile with AB3 is "all.res"
It contains all system structures and Konstants up to OS3.9
and includes usefull macros for systemprogramming.

Additionally "all.res" contains the datas of the seperated residents:
- MUI.res
- SDSTCP.res
- WIZARD.res
- BB2OBJTYPES.res