| Abbreviation | Definition |
|---|---|
| I | Intimidated |
| IA | Insane Assassin |
| IA | Internal Affairs |
| IAC | In Active Case |
| IAC | Indiana Administrative Code |
| IAC | Industrial Arbitration Court |
| IAC | Interagency Commission for Outdoor Recreation |
| IAC | Intermediary Advisory Committee |
| IACA | International Association for Court Administration |
| IAFIS | Integrated Automated Fingerprint Identification System |
| IAS | Inmate Assignment System |
| IAT | Intervention Assistance Team |
| IBASE | Incident Based Database |
| IBE | Illegal Biological Entity |
| IBLB | Illinois Bankruptcy Lawyer Blog |
| IBM | I've Been Mugged |
| IBR | Incident Based Reporting |
| IC | Indiana Code |
| IC | Intentional Choice |
| IC | Intermittent Custody |