| Abbreviation | Definition |
|---|---|
| IAC | Intelligent Analytic Computer |
| IAC | Inter Attribute Constraint |
| IAE | Integral Absolute Error |
| IAF | Interleaf Ascii Format |
| IAG | Illinois Attorney General |
| IAI | Incomplete Artificial Intelligence |
| IAI | Internet Artificial Intelligence project |
| IAP | Interactive Application Processor |
| IAP | Internal Application Process |
| IAVA | Information Assurance Vulnerability Alert |
| IAW | In Another Window |
| IB | Internal Bus |
| IBD | Interface Based Design |
| IBE | Integrated Business Environment |
| IBIS | Issue Based Information System |
| IBM | International Business Machines |
| IBMDOS | IBM's Personal Computer Disc Operating System |
| IBS | Input Buffer Size |
| IBT | Information Business Technology |
| IC | Information Criteria |