TOP SECRET: Recovering and Breaking the U.S. Army and Army Air Force Order of Battle Codes - sidebar
Fall 2000, Vol. 32, No. 3
By Lee A. Gladwin
Meanings of Type of Organization Codes
| Code | Code Abbreviation | Meaning |
| Signal Corps | ||
| A00 | SIG CO | Signal Company |
| A10 | SIG CO AIRBORNE | Signal Company Airborne |
| A21 | RADAR M TY F | Radar Maintenance Type F |
| A90 | ABRN SIG CO | Airborne Signal Company |
| Ordnance | ||
| B61 | HV MAINT FA | Heavy Maintenance Field Army |
| B63 | ORD LM CO | Ordnance Light Maintenance |
| B95 | MED MAINT | Medium Maintenance |
| Chemical Warfare Service | ||
| C50 | CML MORTAR BN | Chemical Mortar Battalion |
| Quartermaster Corps | ||
| D32 | QM CO | Quartermaster Company |
| D82 | TRUCK | Truck |
| Corps of Engineers | ||
| E12 | ENGINEER AVIATION BN | Engineer Aviation Battalion |
| E23, E24 | ENGINEER COMBAT BN | Engineer Combat Battalion |
| E45 | ENGINEER GENERAL SERVICE REGIMENT | |
| E90 | AIRBORNE ENGINEER BN | Airborne Engineer Battalion |
| E95 | ARMORED ENGINEER BN | Armored Engineer Battalion |
| Air Corps | ||
| K15 | BOMB HEAVY (B17, B24) | Heavy Bomber (B17, B24) |
| K16 | BOMB MEDIUM (B25, B26) | Medium Bomber (B25, B26) |
| K30 | FIGHTER SE | Single-Engine Fighter |
| K32 | FIGHTER TE | Twin-Engine Fighter |
| S53 | BOMB HEAVY | Heavy Bomber |
| S55 | BOMB MEDIUM | Medium Bomber |
| S86 | FTR GP SE | Single-Engine Fighter Group |
| S90 | FTR GP TE | Twin-Engine Fighter Group |
| T83 | TR CARR | Troop Carrier |
| Articles published in Prologue do not necessarily represent the views of NARA or of any other agency of the United States Government. |