Annexes
- Predefined language environment
- - Packages include Standard, Ada, Characters, String Handling, and Numerics
- Language interfaces
- - Support for other languages, especially C, COBOL, and FORTRAN
- Systems programming
- - Low level features including interrupt handling, access to machine operations, shared variable access, and task identification
- Real-time
- - Requires the Systems Programming annex
- - Task priorities and scheduling (including dynamic priorities and multiple scheduling algorithms), monotonic time package, and delay accuracy