This page contains a history of additions and changes to procedures and directives in each previous release Click the links to view each release’s history.
- Release 24: new features
- Release 23: new features
- Release 22: new features
- Release 21: new features
- Release 20: new features
- Release 19: new features
- Release 18: new features
- Release 17: new features
- Release 16: new features
- Release 15: new features
- Release 14: new features
- Release 13: new features
- Release 12: new features
- Release 11: new features
- Release 10: new features
- Release 9: new features
- Release 8: new features
- Release 7: new features
- Release 6: new features
- Early history: Releases 1-4