English abbreviations from 150ia to 1usvcr
- 1-50IA (First Battalion 50th Infantry Association)
- 15MG (15 Militia Group)
- 160GHR (160th General Hospital Reunion World War II Association)
- 1-68 AR (1st Battalion, 68th Armor Regiment)
- 16IRA (16th Infantry Regiment Association)
- 179-45DA-D (D Company 179th Infantry 45th Division Association)
- 17AD (17th Airborne Division)
- 17IMA (17th Infantry Memorial Association)
- 17RA (17th Infantry Regiment Association)
- 180FA (180th Field Artillery Regiment)
- 180IA (180th Infantry Association)
- 189FA (189th Field Artillery Regiment)
- 189FA-645TDA (189th Field Artillery & 645th Tank Destroyer Association)
- 193FAA (193rd Field Artillery Association)
- 193SOWA (193rd Special Operations Wing Association)
- 196LIBA (196th Light Infantry Brigade Association)
- 19AI-CSA (19th Alabama Infantry Regiment, Confederate States of America)
- 19BA (19th Bombardment Association)
- 1B (First base)
- 1BCT (First Brigade Combat Team)
- 1CAV (1st Cavalry Division)
- 1CD (1st Cavalry Division)
- 1F3 (Fleet Anti-terrorism Security Team 1, 3rd Platoon)
- 1FTR (One For The Road)
- 1GL (First-Generation Programming Language)
- 1IDMA (1st Infantry Division Memorial Association)
- 1KPOV (1000 Points Of View)
- 1LT (First Lieutenant)
- 1MAW-VS (1st Marine Aircraft Association - Vietnam Service)
- 1MC (General Announcing System)
- 1MX (1st Battalion The Middlesex Regiment)
- 1NCD (1st Naval Construction Division)
- 1NF (First Normal Form)
- 1NHVLB (1st New Hampshire Volunteer Light Battery)
- 1NMVI (1st New Mexico Volunteer Infantry)
- 1NT (Bridge bid to take 7 tricks, No Trump)
- 1OVI (1st Oregon Volunteer Infantry)
- 1P (proven reserves)
- 1RXH ((catalog) 1st ROSAT X-ray HRI, a catalog of sources detected by ROSAT in pointed observations with its High Resolution Imager)
- 1RXS ((catalog) 1ROSAT X-ray Survey, a catalog of sources detected by ROSAT in an all-sky survey)
- 1S1K (One Shot, One Kill)
- 1SG (First Sergeant)
- 1ST IOC (1st Information Operations Command)
- 1st Lt (First Lieutenant)
- 1TBS (One True Brace Style)
- 1USVCR (1st United States Volunteer Cavalry Regiment)