Messages are named by function:
- The first three characters are ICQ
- The fourth and fifth characters indicate the function to which
the message belongs:
- Characters
- Component
- AB
- Administrator courses
- AD
- User types
- AE
- Enrollment
- AI
- ISPF defaults
- AM
- Application Manager
- AN
- Administrator news
- AP
- Administrator printer support
- AS
- APPC/MVS administration dialog
- CA
- Names (All names messages use CA, not only user names messages.)
- CB
- User courses
- CG
- Chart creation
- CI
- An interface for ALPDI-II
- CL
- Interfaces for VS APL and APL2®
- CN
- User news
- CP
- User printer support
- CR
- An interface for ADRS
- GA
- General administrator messages
- GC
- General user messages
- SP
- Space management
- The last three characters uniquely identify the message