| Abbreviation | Definition |
|---|---|
| INOS | Innovation, Neighborship, Originality, and Satisfaction |
| INRES | INdependent REservation System |
| INRI | I'm Not Returning Immediately |
| INS | International Net Settlement Service |
| INT | Intermediate |
| INV | Inventory |
| INV | Investment |
| INVEST | Infrastructure Needs Vision for Economic Security Tomorrow |
| IO | In Often |
| IO | Industrial and Organizational |
| IO | Information Operations |
| IO | Information Organization |
| IO | Insertion Order |
| IOC | Immediate Or Cancel |
| IOC | Indian Oil Corporation |
| IOC | Integration, Organization, Cohesion |
| IOC | Inter-Office Communication |
| IOCM | Intra-Organizational Conflict Management |
| IOCN | Inter-Organisational Communication Network |
| IOD | Information On Demand |