| Abbreviation | Definition |
|---|---|
| INTEL | Integrated Electrolites Limited |
| INTEL | Integrated Electronics |
| INTELLIVOLVE | Intelligent Evolution, Inc. |
| INTERADEP | INTERActive Design, Engineering CNC Programming |
| INTERADEP | INTERActive Design, Engineering & CNC Programming |
| INTR | Inter Ltd. |
| INWEI | INnovative Worldcom Exchange Incorporation |
| IO | Illuminati Online |
| IO | Internex Online |
| IOA | Insurance Office Of America |
| IOA | Islands Of Adventure |
| IOC | Independent Operating Company |
| IOC | Innovation Ontario Corporation |
| IOC | International Oil Company |
| IOCC | Integrated Optical Circuit Consultants |
| IOCL | Indian Oil Corporation Limited |
| IOCL | Indian Organic Chemicals Limited |
| IOCL-G | Indian Oil Corporation Limited - Guwahati Refinery |
| IOCM | Iron Ore Corporation of Madagascar SARL |
| IOCO | Imperial Oil COmpany |