| Abbreviation | Definition |
|---|---|
| COMRELs | Community Relations Project |
| COMSAT | COMmunications SATellite |
| COMSC | COMmander, Military Sealift Command |
| COMSCINST | COMmander, Military Sealift Command INSTruction |
| COMSEC | COMmunications SECurity |
| COMSIT | Common Situation |
| COMSOC | COMmander, Special Operations Command |
| COMSOCCENT | COMmander, Special Operations Command, United States CENTral Command |
| COMSOCEUR | COMmander, Special Operations Command, United States EURopean Command |
| COMSOCPAC | COMmander Special Operations Command, United States PACific Command |
| COMSOCSOUTH | COMmander Special Operations Command, United States SOUTHern Command |
| COMSOF | COMmander, Special Operations Forces |
| COMSPAWARSYSCOM | COMmander SPAce and Naval WARfare SYStems COMmand |
| COMSR | Communication Support Requirements |
| COMSTAT | COMmunications STATus |
| COMSUBLANT | COMmander SUBmarine Force, United States AtLANTic Fleet |
| COMSUBPAC | COMmander SUBmarine Force, United States PACific Fleet |
| COMSUPNAVFOR | COMmander, SUPporting NAVal FORces |
| COMSY | Commissary |
| COMTAC | TACtical COMmunications |