| IGB | I Gone Bananas
| Others |
| IGB | I Got Bored
| Others |
| IGB | Icecrown Gunship Battle
| Others |
| IGB | Illegal Gambling Business
| Others |
| IGB | Illinois Gaming Board
| Others |
| IGB | Illuminated Glove Box
| Others |
| IGB | In Game Balance
| Others |
| IGB | Inner German Busroutes
| Others |
| IGB | Institut Gregory Bateson
| Others |
| IGB | Institute for Genomic Biology
| Others |
| IGB | Institute for Genomics and Bioinformatics
| Others |
| IGB | Integrated Genome Browser
| Others |
| IGB | Integrative Genomics Building
| Others |
| IGB | Interconnector Greece Bulgaria
| Others |
| IGB | Intermediate Gear Box
| Others |
| IGB | Intermediate Gear Box (see SAGB)
| Others |
| IGB | International Geography Bee
| Others |
| IGB | International Geophysical Bulletin
| Others |
| IGB | International Governing Body
| Others |
| IGB | International Government Board
| Others |
| IGB | International Grand Ball
| Others |
| IGB | International Grinding Boyz
| Others |
| IGB | Interschool Governing Board
| Others |
| IGB | Investment Grade Bonds
| Others |
| IGB | Irish Greyhound Board
| Others |
| IGB | Italian Golf Buddies
| Others |