| A/G | Air to Ground 
| Others |
| A/G | Air-To-Ground
| Others |
| A/G | Albumin-to-Globulin
| Others |
| A/G | Albumin/Globulin ratio
| Others |
| AG | Abbeville-Grimes Railway (Bay Line Railroad)
| Others |
| AG | Abbreviations German
| Others |
| AG | About Good
| Others |
| AG | Abstract Geometry
| Others |
| AG | Academically Gifted
| Others |
| AG | Acapulco Gold
| Others |
| AG | Accepted Games
| Others |
| AG | Accountant General
| Others |
| AG | Accredited Genealogist
| Others |
| AG | Acoustic Guitar
| Others |
| AG | Acrobatic Gardener
| Others |
| AG | Actien Gesellschaft
| Others |
| AG | Action Group
| Others |
| AG | Actuarial Society
| Others |
| AG | Actuarieel Genootschap
| Others |
| aG | Adiccted Gamer
| Others |
| AG | Adjutant General
| Others |
| AG | Adventure Guide
| Others |
| AG | Affiliated Group
| Others |
| AG | After Garcia
| Others |
| AG | After Goddess
| Others |
| AG | After Golgotha
| Others |
| AG | After Guild
| Others |
| AG | Age Group
| Others |
| AG | Agent Group
| Others |
| AG | Aggravating Grunt
| Others |
| AG | Aggregate Grizzly
| Others |
| AG | Aging Gracefully
| Others |
| AG | Agriculture General
| Others |
| AG | Agrigento
| Others |
| AG | Aipermon GmbH
| Others |
| AG | Air-Ground
| Others |
| AG | Aktien Gesellschaft
| Others |
| AG | AktienGesellschaft
| Others |
| AG | Aktiengesellschaft German
| Others |
| AG | Aktiengesellschaft the german
| Others |
| AG | Al Gore
| Others |
| AG | Alan Greenspan
| Others |
| AG | Albertu Ghraibzales
| Others |
| AG | Algebraic Graph
| Others |
| AG | All Good
| Others |
| AG | All Grain
| Others |
| AG | All Gundam
| Others |
| AG | All the Gospel
| Others |
| AG | Allen Grove
| Others |
| AG | Allied Grocers
| Others |
| AG | Allocated Greenbacks
| Others |
| AG | Almost Good
| Others |
| AG | Almost Governor
| Others |
| AG | Alpha Geek
| Others |
| AG | Always Generally
| Others |
| AG | Amazing Guy
| Others |
| AG | Amcha Ghar
| Others |
| AG | Amercian Gunners
| Others |
| AG | America Gila
| Others |
| AG | American Gebi
| Others |
| AG | American Girl
| Others |
| AG | Anastomosis Group
| Others |
| AG | Anatomische Gesellschaft
| Others |
| AG | and AG
| Others |
| AG | Animal Girl
| Others |
| AG | Anime Gamers
| Others |
| AG | Anime Genesis
| Others |
| AG | Anime Genisis
| Others |
| AG | Anion Gap
| Others |
| AG | Annoying Git
| Others |
| AG | Annus Gatesis
| Others |
| AG | Anti-Gravity
| Others |
| AG | Antigen
| Others |
| AG | Antigen Ag
| Others |
| AG | Antigua and Barbuda
| Others |
| AG | Anything Goes
| Others |
| AG | Application Gateway
| Others |
| AG | Applied Geomechanics
| Others |
| AG | Arabian Gulf
| Others |
| AG | Architectural Group
| Others |
| AG | Area Governor
| Others |
| AG | Argovia
| Others |
| AG | Army Group
| Others |
| AG | Army Guidance
| Others |
| AG | Arnaud Guera
| Others |
| AG | Arnold and Gosling
| Others |
| AG | Artificial Gravity
| Others |
| AG | Asamblea General
| Others |
| AG | Aspiration Goal
| Others |
| AG | Aspiring Governor
| Others |
| AG | Assist Gate
| Others |
| AG | Associated Grocers
| Others |
| AG | Association for Gnotobiotics
| Others |
| AG | Astonishing Greatness
| Others |
| AG | Astronomische Gesellschaft
| Others |
| AG | Atri Graphics
| Others |
| AG | Attitude Gyroscope
| Others |
| AG | Attorney General
| Designation / Rank, Legal |
| AG | Attribute Grammar
| Others |
| AG | Au Ag
| Others |
| AG | Audio Graphics
| Others |
| AG | Auditor General
| Others |
| AG | Australia Group
| Others |
| AG | Author's Guide
| Others |
| AG | Authors' Guide
| Others |
| AG | Automotive Group
| Others |
| AG | Auxiliary Grants
| Others |
| AG | Auxiliary Gymnasium
| Others |
| AG | Avant Garde
| Others |
| AG | Average Gypsy
| Others |
| AG | Awesome Guy
| Others |
| AG | Axtin Glenny
| Others |
| AG | Ayatollah General
| Others |
| AG | Ayer Guerra
| Others |
| AG | Galveston Railroad L. P.
| Others |
| AG | General Auxiliary (Auxiliary, General)
| Others |
| AG | Silver
| Element |
| Ag | Silver (Argentum)
| Others |
| AG | Solomon Islands
| Others |