| Abbreviation | Definition |
|---|---|
| IPVG | Intellectual Property Ventures Group |
| IQ | I Quit |
| IR | Ideal Reno |
| IR | International Roach |
| IRA | Informatik Rechner Abteilung |
| IRAD | Issue Resolution and Determination |
| IRAL | Ian Ritchie Architects Ltd |
| IRANMCT | Iran Management Consultants Team |
| IRAPT | The ISPT Retail Australia Property Trust |
| IRBC | Industrial Revolution Brewing Company |
| IRC | International Resistive Company, Inc. |
| IRCB | Integrated Rubber Corp Bhd |
| IRCB | Integrated Rubber Corporation Berhad |
| IRCB | Interport Resources Corp B |
| IRCC | India Rubber Comb Company |
| IRCP | International Research Corp PCL |
| IRCP | International Research Corporation PCL |
| IRCTC | Indian railway catering and trousim corporation |
| IRCTC | Indian Railways Catering and Tourism Corporation |
| IRD | Independent Record Distributing |