English abbreviations from 2000 to 2b
- 2000 (version 5.0 of Microsoft Windows)
- 201FAA (201st Infantry Field Artillery Association)
- 201MIB (201st Military Intelligence Battalion)
- 201MIBA (201st Military Intelligence Battalion Association)
- 20RI-A (20th Regimental Infantry - Company A)
- 20SCVI (20th South Carolina Volunteer Infantry Regiment)
- 20SFS (20th Special Forces Society)
- 21CF (Twenty- First Century Foundation)
- 21CLW (21st Century Land Warrior)
- 21CLWTLD (21st Century Land Warrior Top Level Demonstration)
- 22BGA (22nd Bombardment Group Association)
- 22BSA (22nd Bomb Squadron Association)
- 22IRS (22nd Infantry Regiment Society)
- 22MA (22nd Marines Association)
- 23BSA (23rd Bombardment Squadron (Heavy) Association)
- 24CTM (24th Connecticut Militia Regiment)
- 24IRA (24th Infantry Regiment Association)
- 24IRA-NW (24th Infantry Regiment Association - Northwest Chapter)
- 24IVI (24th Iowa Volunteer Infantry Regiment)
- 24 MEU (24th Marine Expeditionary Unit)
- 24NAF (24th Numbered Air Force)
- 250FABRG (250th Field Artillery Battalion Reunion Group)
- 25BGRA (25th Bomb Group Reconnaissance Association)
- 25IDA (25th Infantry Division Association)
- 25IDA 3/4 (25th Infantry Division 3rd Squadron 4th Cavalry Chapter)
- 25MPC (25th Military Police Company Reunion)
- 26IRA (26th Infantry Regiment Association)
- 26PEMR (26th Pennsylvania Emergency Militia Regiment)
- 278 ACR (278th Armored Cavalry Regiment)
- 278RCTA (278th Regimental Combat Team Association)
- 27DA (27th Division Association)
- 27FWR (27th Fighter Wing Reunion Group)
- 27TCSF (27th Troop Carrier Squadron Foundation)
- 280CEBA (280th Combat Engineer Battalion Association)
- 286 (Intel 80286 processor)
- 28IA (28th Infantry Association)
- 28MASHA (28th Military Airlift Squadron Historical Association)
- 28MAVI (28th Massachusetts Volunteer Infantry)
- 28VAI-C (28th Virginia Infantry Regiment Company C)
- 28WA (28th Wing Association)
- 29DA (29th Division Association)
- 2A5CB (2 Amino 5 Chloro Benzophenone)
- 2AD (2nd Armored Division)
- 2B (Double)