| Acronym | Definition |
|---|
| IQ | Intelligence Quotient |
| IQ | Indefinite Quantity contract |
| IQ | Iraq (country code, top level domain) |
| IQ | Image Quality |
| IQ | Installation Qualification |
| IQ | Information Quality |
| IQ | Investissement Québec (French) |
| IQ | In-phase/Quadrature |
| IQ | Intelligent Question |
| IQ | Inverse Quantization |
| IQ | Irrelevant Question (polygraphy) |
| IQ | Inhibitory Quotient |
| IQ | Issue Queue |
| IQ | Intervencion Quirurgica (Spanish: Surgical Procedure) |
| IQ | Indication of Quality (Nortel) |
| IQ | Insufficient Quantity |
| IQ | Indy Quotient (computer game score) |
| IQ | Input Queuing |
| IQ | Initial Qualification Training |
| IQ | Insurquote Systems Inc. |
| IQ | Incremental Quantization |
| IQ | Invoice Query System (Sprint) |
| IQ | United States miscellaneous Pacific Islands Outlying Areas (including Kingman Reef) |