| AA | Antiaircraft |
| A&:S; | Army and Navy |
| AAC | Army Air Corps |
| AAF | Army Air Forces |
| ABC | American-British Conversations (Jan-Mar 41) |
| ABDA | (COM) Australian-British-Dutch-American (Command) |
| ACofS | Assistant Chief of Staff |
| Actg | Acting |
| ADB | American-Dutch-British |
| ADC | Alaska Defense Command |
| Add | Additional |
| Admin | Administration |
| Adv | Advance |
| AEF | Allied Expeditionary Force |
| AFHQ | Allied Force Headquarters |
| AG | Adjutant General |
| AGF | Army Ground Forces |
| AGO | Adjutant General's Office |
| Alt | Alternate |
| ALUSNA | U. S. naval attaché |
| Am | Ammunition |
| Amer | American |
| AMMISCA | American Military Mission to China |
| Amph | Amphibious (ian ) |
| Arty | Artillery |
| ASF | Army Service Forces |
| Asgmt(s) | Assignment (s) |
| ASW | Assistant Secretary of War |
| ATC | Air Transport Command |
| Atchd | Attached |
| AVG | American Volunteer Group (in China) |
| AWPD | Air War Plans Division |
| Bomb | Bombardment |
| Br | British, branch |
| Br Jt Stf Miss | British Joint Staff Mission |
| Bsc | Basic |
| BuAer | Bureau of Aeronautics |
| CAAF | Chief Army Air Forces |
| CBI | China-Burma-India |
| CCS (COOS) | Combined Chiefs of Staff (British-American ) |
| CDC | Caribbean Defense Command |
| CG | Commanding general |
| Chem | Chemical |
| Chm | Chairman |
| CIGS | Chief Imperial General Staff |
| CINC | Commander in Chief |
| CINCAF | Commander in Chief, U. S. Asiatic Fleet |
| CINCPAC | Commander in Chief, U. S. Pacific Fleet |
| CM-IN | Cable message, incoming |
| CM-OUT | Cable message, outgoing |
| CMTC | Combined Military Transport Committee |
| CNO | Chief of Naval Operations |
| CofAAC | Chief of Army Air Corps |
| CoAC | Chief of Air Corps |
| CofAS | Chief of Air Staff |
| CofS | Chief of Staff |
| Csofs | Chiefs of Staff |
| Collab | Collaboration |
| C.om | Committee |
| COMALSEC | Commander Alaskan Sector |
| Cornd (s) | Command (s ) |
| Corndg | Commanding |
| Comdr | Commander |
| Corndt | Commandant |
| COMGENSOPAC | Commanding General, U. S. Army Forces in the South Pacific |
| Comm | Commission |
| COMINCH | Commander in Chief, U. S. Fleet |
| COMNAVEU | Commander U. S. Naval Forces, Europe |
| COMSOPAC | Commander, South Pacific |
| Conf (s) | Conference (s ) |
| Contl | Control |
| Conv (s) | Conversation (s ) |
| COS | Chief (s) of Staff (British) |
| CPE | Charleston Port of Embarkation |
| CPS | Combined Staff Planners |
| CSigO | Chief Signal Officer |
| CTF | Commander Task Force |
| CTO | China Theater of Operations |
| DCofS | Deputy Chief of Staff |
| Def (s) | Defense (s) |
| Dept | Department |
| Det | Detachment |
| D/F | Disposition Form |
| Dir | Director |
| Dist | District |
| DRB AGO | Departmental Records Branch, Adjutant General's Office |
| EDC | Eastern Defense Command |
| Emb | Embarkation |
| Engr | Engineer |
| Equip | Equipment |
| Est | Estimate |
| Estab | Establish (ment ) |
| LTO | European Theater of Operations |
| ETOUSA | European Theater of Operations. U. S. Army |
| Exch | Exchange |
| G-1 | Personnel section of divisional or higher staff |
| G-2 | Intelligence section |
| G-3 | Operations section |
| G-4 | Supply section |
| GHQ | General Headquarters |
| Gp | Group |
| GS | General Staff |
| Gt Brit | Great Britain |
| Hist | History, historical |
| Hv | Heavy |
| IB | Intelligence Bulletin |
| Incl | Inclosed, inclosing, inclosure, including |
| Ind | Indorsed, indorsement |
| Indef | Indefinite |
| Info | Information |
| Instn(s) | Instruction(s) |
| Intel Intelligence | |
| JB | Joint Board |
| JCS | Joint Chiefs of Staff |
| JIC | Joint Intelligence Committee |
| JPC | Joint (Army and Navy) Planning Committee |
| Jt Plng Com | Joint (American-British) Planning Committee |
| JPS | Joint Staff Planners |
| JSM | Joint Staff Mission (British) |
| Jt | joint |
| JSSC | Joint Strategic Survey Committee |
| JUSSC | Joint U. S. Strategic Committee |
| Ln | Liaison |
| MAB | Munitions Assignments Board |
| Mar | Maritime |
| MBW | Munitions Assignments Board in Washington |
| M Day | Mobilization Day |
| ME | Middle East |
| Mil | Military |
| Min | Minutes |
| MIS | Military Intelligence Service |
| Misc | Miscellaneous |
| Miss | Mission |
| Mtg | Meeting |
| Mun | Munitions |
| Mvmt | Movement |
| N Af | North Africa |
| Natl | National |
| Nav | Naval |
| NYPE | New York Port of Embarkation |
| Obsn (s) | Observation (s) |
| Obsr(s) | Observer (s) |
| OCAAC | Office of the Chief of the Army Air Corps |
| OCofS | Office of the Chief of Staff |
| OCT | Office of the Chief of Transportation |
| Off(s) | Office (s) , officer (s) |
| OPD | Operations Division |
| OpNav | Office of the Chief of Naval Operations |
| Opn(s) | Operation (s) |
| Orgn | Organization |
| OSW | Office of the Secretary of War |
| Pdn | Production |
| Pers | Personal, personnel |
| PGSC | Persian Gulf Service Command |
| Phil | Philippines |
| P. I. | Philippine Islands |
| PL | Public Law |
| Plng | Planning |
| POA | Pacific Ocean Area |
| POE | Port of Embarkation |
| PTO | Pacific Theater of Operations |
| RAF | Royal Air Force |
| RAAF | Royal Australian Air Force |
| Red | Record |
| Rccd | Received |
| Ref | Reference: |
| Regd Doc (s) | Registered Document (s) |
| Regt(s) | Regiment (s) |
| Rep (s) | Representative (s) |
| Repl(s) | Replacement (s) |
| Req | Required, requisition |
| Reqmt(s) | Requirement (s) |
| Rev | Revised, revision |
| R&R | Record and routing |
| SAS | Secretary of the Air Staff |
| Sched(s) | Schedule (s) |
| Sec (s) | Section (s) |
| Sccy | Secretary |
| Ser(s) | Serial (s) |
| Scrv | Service |
| SFPE | San Francisco Port of Embarkation |
| SGS | Secretary of the General Staff |
| Shipt(s) | Shipment (s) |
| Sit | Situation |
| SJB | Secretary of the joint Board |
| SN | Secretary of the Navy |
| SOS | Services of Supply |
| SPA | South Pacific Area |
| Sp | Special |
| S&P | Strategy and Policy |
| SPENAVO | Special Naval Observer, London |
| SPOBS | Special Army Observer Group in London |
| Stf | Staff |
| Sum(s) | Summary (ies) |
| SW | Secretary of War |
| SWPA | Southwest Pacific Area |
| T | Theater |
| TAG | The Adjutant General |
| TDUN | Tentative Deployment of United Nations, 1942 |
| Tech | Technical |
| TEDA | Tentative Deployment of U. S. Forces, 1942 |
| Tel | Telephone |
| Trig | Training |
| Transf | Transfer |
| Tr(s) | Troops) |
| U.K. | United Kingdom |
| U.N. | United Nations |
| USAFBI | United States Army Forces in the British Isles |
| USAFFE | United States Army Forces in the Far East |
| USAFIA | United States Army Forces in Australia |
| USAFICA | United States Army Forces in Central Africa |
| USAFIME | United States Army Forces in the :Middle East |
| USAFISPA | United States Army Forces in the South Pacific Area |
| USSBS | United States Strategic Bombing Survey |
| WDC | Western Defense Command |
| WDCMC | War Department Classified Message Center |
| WDCSA | Chief of Staff, U. S. Army |
| WDGS | War Department General Staff |
| WO | War Office (British) |
| WPB | War Production Board |
| WPD | War Plans Division |
| Yr | Year |