| Abbreviation | Definition |
|---|---|
| IPC | Instructions Per Cycle |
| IPD | Image Per Dollar |
| IPFU | International Pharmaceutical Federation Units |
| IPM | Impressions Per Minute |
| IPM | Inches Per Minute |
| IPR | Inches Per Revolution |
| IPS | Images Per Second |
| IPS | Inches Per Second |
| IPS | Instructions Per Second |
| IPS | Iron Pipe Size |
| IPU | Index Participation Units |
| IRD | Intstrument Recalibration Date |
| ISO | International Organisation for Standardization |
| ISO | International Standards Organization |
| ITU | International Toxicity Unit |
| IU | Information Unit |
| IU | Intensity Units |
| IU | International Units |
| IV | 4 |
| J | Jigger |