| AC/S | Assistant Chief of Staff |
| BB | Battleship |
| CinCAF | Commander in Chief, Asiatic Fleet |
| CinCLANT | Commander in Chief, Atlantic Fleet |
| CinCPAC | Commander in Chief, Pacific Fleet |
| CinCUS | Commander in Chief, United States Fleet |
| CNO | Chief of Naval Operations |
| Cominch | Commander in Chief, United States Fleet (after March 18, 1942) |
| DD | Destroyer |
| DIO | District Intelligence Office |
| FCC | Federal Communications Commission |
| G-2 | Intelligence (Army) |
| GMT | Greenwich Mean Time |
| JAG | Judge Advocate General |
| NYK | Japanese steamship line Nippon Yusen Kaisha |
| ONI | Office of Naval Intelligence |
| OPNAV | Chief of Naval Operations |
| SIS | Signal Intelligence Service |
| SOP | Standing Operating Procedure |
| TAG | The Adjutant General |
| USAFFE | U.S. Armed Forces Far East |