| International Geological Congress | Academic & Science |
| Institute for Global Communications | Academic & Science |
| International General Certificate | Business |
| Informative Graphics Corp | Business |
| Interstate General, L. P. | Business |
| Imperial Gold Crown | Business |
| Income Generation Capability | Business |
| India Capital Growth fund, LTD. | Business |
| Islamic Guidance Center | Community |
| Indiana Gaming Commission | Computing |
| Integrated Graphic Chipset | Computing |
| Intel Graphics Shader Compiler | Computing |
| International Growth Centre | General |
| India Globalization Capital | General |
| International Gliding Commission | General |
| International Gloving Championship | General |
| Inert Gas Compaction | General |
| I get cheeks | General |
| Ismir Genre Contest | General |
| Indie Game Collection | General |
| IdenTrust Global Common | General |
| Inverse Gas Chromatography | General |
| Instant Grammar Checker | General |
| Instantaneous Gear Change | General |
| Ignition Coil | General |
| Ignition Controlled Module | General |
| International Grains Council | Governmental |
| Institute for Global Citizenship | Governmental |
| Institute for Gravitation and the Cosmos | Governmental |
| Integrated Greek Council | Governmental |
| Internet Gaming Council | Governmental |
| Inter-Governmental Conference | Governmental |
| Inter-Governmental Consultation | Governmental |
| International Gloving Competition | International |
| International Genomics Consortium | Medical |
| International Gymnastics Camp | Sports |
| International Gymnastic Camp | Sports |
| International Golf Corporation | Sports |
