Here is the list covered by the first letter A indicates the "general function" or letters "location to the broader "sense. Only 17 letters are used in the first position. Study them carefully as a matter awaits you on the next page.
A - Water supply
- C - Condenser
- D - Ventilation and handling equipment
- E - Enceinte
- G - Turbo-alternator
- J - Fire protection
- K - Control and Monitoring
- L - Electrical systems
- P - Septic
- R - Reactor
- S - General services
- T - Effluent treatment
- V - Main steam system
- X - Auxiliary steam system
- Y - Temporary installation
