| Abbreviation | Definition |
|---|---|
| IAS | Integrated Acquisition System |
| IATAC | Information Assurance Technology Analysis Center |
| IBAN | International Bank Account Number |
| IBC | Institutional Biosafety Committee |
| IBE | Integrated Business Environment |
| IBIS | Interagency Border Inspection System |
| IBO | Independent Business Owner |
| IC | Internal Communication |
| ICA | Independent Contracting Agent |
| ICAC | Independent Commission Against Corruption |
| ICANN | Internet Corporation for Assigned Names and Numbers |
| ICASS | International Cooperative Administrative Support Services |
| ICB | Individual Case Basis |
| ICB | Interim Certification Board |
| ICBM | Inter- City Beer Missile |
| ICC | I Create Crisis |
| ICC | Increased Cost Of Compliance |
| ICC | Isthmian Canal Commission |
| ICCT | Inter-agency Contracts Coordinating Team |
| ICE | Immigration and Customs Enforcement |