| AA |
Antiaircraft |
| AACS |
Army Airways Communications System |
| AAF |
Army Air Forces |
| AAFSAT |
Army Air Forces School of Applied Tactics |
| AAG |
Air Adjutant General |
| AARS |
Army Amateur Radio System |
| AB |
Air Base |
| AC |
Air Corps or alternating current |
| AC&EC |
Army Communications and Equipment Coordination |
| ACAN |
Army Command and Administrative Network |
| ACB |
Army Communications Board |
| ACD |
Army Communications Division, OCSigO |
| ACofAS |
Assistant Chief of Air Staff |
| ACofS |
Assistant Chief of Staff |
| ACS |
Alaska Communication System |
| Actg |
Acting |
| ADC |
Alaska Defense Command |
| Adm |
Administrative |
| AF |
Air Forces or air force |
| AFACT |
Assistant Chief of Air Staff, Training |
| AFCC |
Air Force Combat Command |
| AFHQ |
Allied Forces Headquarters |
| AFofL |
American Federation of Labor |
| AFMIDPAC |
Army Forces, Middle Pacific |
| AFRDB |
Air Force Research and Development Branch |
| AFTSC |
Air Force Technical Service Command |
| AG |
Adjutant General |
| AGCT |
Army General Classification Test |
| AGF |
Army Ground Forces |
| AGL |
Airborne gun laying |
| AGO |
Adjutant General's Office |
| AI |
Airborne interception (radar ) |
| AM |
Amplitude modulation (radio) |
| AMET |
Africa-Middle East Theater |
| AN |
Army-Navy |
| ANCPEA |
Army-Navy Communications Production Expediting Agency |
| ANEPA |
Army-Navy Electronics Production Agency |
| ANMB |
Army and Navy Munitions Board |
| APD |
Army Pictorial Division, OCSigO |
| APHB |
Army Pearl Harbor Board |
| APO |
Army Post Office |
| APS |
Army Pictorial Service |
| AR |
Army Regulations |
| ARL |
Aircraft Radio Laboratory |
| ARO |
Airborne range only |
| ASC |
Air Service Command |
| ASF |
Army Service Forces |
| ASG |
Naval sets related to ASV |
| ASP |
Army Supply Program |
| ASV |
Air-to-surface-vessel (radar) |
| AT&T |
American Telephone and Telegraph Company |
| ATC |
Air Transport Command |
| Avn |
Aviation |
| AW |
Aircraft warning |
| AWS |
Aircraft Warning Service |
| Bd |
Board |
| Bn |
Battalion |
| Br |
Branch |
| BTO |
Bombing-through-overcast (radar) |
| BWI |
British West Indies |
| C&E |
Coordination and Equipment |
| CA |
Coast Artillery |
| CAA |
Civil Aeronautics Administration |
| CAC |
Coast Artillery Corps |
| CAF |
Clerical, Administrative, and Fiscal (a category of civil servants) |
| CBI |
China-Burma-India |
| CCB |
Combined Communications Board |
| CCS |
Combined Chiefs of Staff |
| CD |
Coast Defense (radar) |
| CESL |
Camp Evans Signal Laboratory |
| CG |
Commanding General |
| CH |
Chain Home |
| CHL |
Chain Home Low |
| CIO |
Congress of Industrial Organizations |
| CMP |
Controlled Materials Plan |
| CNC |
Chief of Naval Communications |
| CNO |
Chief of Naval Operations |
| Co |
Company |
| CofCA |
Chief of Coast Artillery |
| CofE |
Chief of Engineers |
| CofS |
Chief of Staff |
| COL |
Chain Overseas Low (British radar) |
| Com |
Communication or communications. Com is used throughout this volume as the abbreviation for both
communication and communications in accordance with Army practice during the war period, although Signal Corps men used
the abbreviation comm. |
| Comd |
Command |
| Comdr |
Commander |
| Conf |
Conference |
| Const |
Construction |
| Coord |
Coordination |
| CSigO |
Chief Signal Officer |
| DA |
Department of the Army |
| DC |
Direct current |
| Dev |
Development |
| DF |
Direction finding (radio) or direction finder |
| Dir |
Director |
| Dist |
District |
| Distr |
Distribution |
| Div |
Division |
| Doc |
Document |
| DRB |
Departmental Records Branch (AGO) |
| EEIS |
Enemy Equipment Identification Service |
| Engrs |
Engineers |
| Equip |
Equipment |
| ERC |
Enlisted Reserve Corps |
| ESCRTC |
Eastern Signal Corps Replacement Training Center |
| ESCS |
Enlisted Signal Corps School |
| ETG |
Electronics Training Group |
| ETO |
European Theater of Operations |
| ETOUSA |
European Theater of Operations, United States Army |
| EW |
Early warning (radar) |
| Ex 0 |
Executive Order |
| Exped |
Expediting |
| FA |
Field Artillery ( Corps) |
| FCC |
Federal Communications Commission |
| FEAF |
Far East Air Force |
| Fld |
Field |
| FM |
Frequency modulation (radio) |
| FY |
Fiscal Year |
| G-1 |
Personnel Section of the War Department General Staff, or of any other headquarters on the division
level or higher |
| G-2 |
Military Intelligence Section |
| G-3 |
Operations and Training Section |
| G-4 |
Supply Section |
| GCI |
Ground-controlled interception (radar) |
| GCT |
Greenwich Civil Time |
| GD |
General Development |
| GHQ |
General Headquarters |
| GL |
Gun laying (radar) |
| GO |
General Order |
| Gp |
Group |
| GSA |
General Services Administration |
| GSC |
General Staff Corps |
| Hist |
History or historical |
| HPG |
High Power Group |
| HUSAFMIDPAC |
Headquarters, United States Army Forces, Middle Pacific |
| I&M |
Installation and Maintenance |
| IBM |
International Business Machine Corp. |
| IFF |
Identification, friend or foe (radar) |
| IGD |
Inspector General's Department |
| ILS |
Instrument landing system |
| Ind |
Indorsement |
| Inf |
Infantry |
| Inspec |
Inspection |
| Instl |
Installation |
| Intel |
Intelligence |
| Interv |
Interview |
| IRE |
Institute of Radio Engineers |
| ISIB |
Inter-Service Ionosphere Bureau |
| JAGD |
Judge Advocate General's Department |
| JAGO |
Judge Advocate General's Office |
| JANP |
Joint Army Navy Procedure |
| JCB |
Joint Communications Board |
| JCS |
Joint Chiefs of Staff |
| Jt |
Joint |
| KW |
Kilowatt |
| LAB |
Low altitude bombsight |
| LCP |
Landing Craft Personnel |
| LRN |
Loran (navigational radar aid) |
| Ltr |
Letter |
| LW |
Light warning (radar) |
| M Day |
Mobilization Day |
| Maint |
Maintenance |
| MAL |
Multiairline (a type of British pole line construction) |
| Mat |
Material or materiel |
| MESC |
Middle East Service Command |
| MEW |
Microwave Early Warning (radar) |
| Mil |
Military |
| Min |
Minutes |
| MIS |
Military Intelligence Service |
| MIT |
Massachusetts Institute of Technology |
| MRU |
Mobile Radio Unit (a type of British radar) |
| Msg |
Message |
| MTOUSA |
Mediterranean Theater of Operations, U.S. Army |
| MWSCS |
Midwestern Signal Corps School |
| NATO |
North African Theater of Operations |
| NATOUSA |
North African Theater of Operations, U.S. Army |
| NCS |
Net Control Station (radio) |
| NDRC |
National Defense Research Committee |
| NEI |
Netherlands East Indies |
| NIBC |
Northern Ireland Base Command |
| O/C |
Officer in charge |
| OASW |
Office of the Assistant Secretary of War |
| OCMH |
Office of the Chief of Military History |
| OCS |
Office of the Chief of Staff or Officer Candidate School |
| OCSigO |
Office of the Chief Signal Officer |
| OCT |
Office of the Chief of Transportation |
| Off |
Office |
| OPD |
Operations Division, WDGS |
| Opns |
Operations |
| Orgn |
Organization |
| OSRD |
Office of Scientific Research and Development |
| OUSW |
Office of the Under Secretary of War |
| P&D |
Procurement and Distribution |
| P&T |
Personnel and Training |
| PEA |
Plant Engineering Agency |
| PERL |
Pictorial Engineering and Research Laboratory |
| Pers |
Personnel |
| Photo |
Photographic |
| PL |
Public Law |
| PMP |
Protective Mobilization Plan |
| POE |
Port of Embarkation |
| PPI |
Plan position indicator (a type of radar oscilloscope) |
| Proc |
Procurement |
| Prod |
Production |
| Prog |
Progress |
| Proj |
Project |
| PSCPD |
Philadelphia Signal Corps Procurement District |
| PTT |
Postes, Telegraphes et Telephones |
| Purch |
Purchasing |
| R&AC |
Radar and Air Communications |
| R&D |
Research and Development |
| R&R |
Routing and Record (sheet, in AAF office usage) |
| R&W |
Routing and Work (sheet, in SigC office usage) |
| RAAF |
Royal Australian Air Force |
| RAF |
Royal Air Force |
| RCA |
Radio Corporation of America |
| Rcds |
Records |
| RCM |
Radio/radar countermeasures |
| RDF |
Radio direction finding (a term for radar before early 1942) or radio direction finder |
| Res |
Reserve |
| Ret |
Retired |
| Rqmts |
Requirements |
| RI |
Radio Intelligence |
| RL |
Radiation Laboratory (at MIT, radar research for NDRC) |
| ROTC |
Reserve Officers Training Corps |
| RPF |
Radio position finding (a term for radar before early 1942) or radio position finder |
| RPL |
Rapid pole line (a type of pole line construction) |
| Rpt |
Report |
| RR |
Radio recognition (radar, similar to IFF ) |
| RTC |
Replacement Training Center |
| Rtty |
Radioteletype |
| S&I |
Storage and Issue |
| SADU |
Sea Search Attack Development Unit |
| SAS |
Signal Airways Service |
| SAW |
Signal Aircraft Warning |
| SC |
Signal Corps |
| SCASS |
Signal Corps Aircraft Signal Service |
| SCEL |
Signal Corps Engineering Laboratories |
| SCGDL |
Signal Corps General Development Laboratory |
| SCGSS |
Signal Corps Ground Signal Service |
| SCIA |
Signal Corps Intelligence Agency |
| SCL |
Signal Corps Laboratories |
| SCPC |
Signal Corps Pictorial Center |
| SCPL |
Signal Corps Photographic Laboratory |
| SCR |
Set complete radio |
| SCRL |
Signal Corps Radar Laboratory |
| SCRTC |
Signal Corps Replacement Training Center |
| SCS |
Sector control system ( radio and radar assemblage employed in aircraft interception) |
| Sec |
Section |
| Sen |
Senate |
| Sess |
Session |
| SFSCPD |
San Francisco Signal Corps Procurement District |
| SigC |
Signal Corps |
| SigO |
Signal Officer |
| SIS |
Signal Intelligence Service |
| SLC |
Search light control (radar) |
| SOI |
Signal Operating Instructions |
| SOS |
Services of Supply |
| SPA |
South Pacific Area |
| SPBC |
South Pacific Base Command |
| Spec |
Special or specialist |
| SPOBS |
Special Observer (U.S. Army group in London ) |
| SSCS |
Southern Signal Corps School |
| Stat |
Statistics or statistical |
| Sv |
Service |
| SWPA |
Southwest Pacific Area |
| T/BA |
Table of Basic Allowances |
| T/O |
Tables of Organization |
| TAG |
The Adjutant General |
| TBX and TBY |
Types of short range Navy radios |
| TC |
Transportation Corps |
| Tech |
Technical |
| TF |
Task Force |
| TFPL |
Training Film Production Laboratory |
| Tng |
Training |
| TRU |
Transportable radio unit (a type of British radar) |
| TWX |
Teletypewriter exchange |
| UHF |
Ultrahigh frequency |
| USAFBI |
United States Army Forces in the British Isles |
| USAFFE |
United States Army Forces in the Far East |
| USAFIA |
United States Army Forces in Africa |
| USAFIME |
United States Army Forces in the Middle East |
| USFIP |
United States Forces in the Philippines |
| USAFISPA |
United States Army Forces in the South Pacific Area |
| USFOR |
United States Forces |
| USN |
United States Navy |
| USNR |
United States Navy Reserve |
| USSR |
Union of Soviet Socialist Republics |
| USW |
Under Secretary of War |
| VHF |
Very high frequency |
| VT |
Vacuum tube |
| Waac |
Member of the Women's Army Auxiliary Corps |
| WAC |
Women's Army Corps |
| WD |
War Department |
| WDGS |
War Department General Staff |
| WO |
Warrant Officer |
| WP&T |
War Plans and Training |
| WPB |
War Production Board |
| WPD |
War Plans Division, WDGS |
| W/T |
Wireless telegraph, i.e., radio |