| Abbreviation | Definition |
|---|---|
| HLCF | Holographic Light Control Film |
| HP5 | Hypersensitive Panchromatic 5 |
| HPB | Half-Person Blurring |
| HPP | HyperPhoto Project |
| HSYNC | Horizontal Sync |
| HUPS | Hull University Photography Society |
| HYPO | Sodium HYPOsulfate |
| IBL | Ice Blue Lens |
| IBLR | Ice Blue Lens, inteRnal |
| ICCP | International Conference on Computational Photography |
| ICE | Image Correction and Enhancement |
| ICP | International Center of Photography |
| IF | Internal Focus |
| IGS | Inter-Generational Snapshot |
| IIAP | International Institute of Art Photography |
| ILS | Interchangeable Lens System |
| ILT | Individual Lens Technology |
| IMPA | International Mission Photography Archive |
| IMS | Image Management Service |
| IPA | International Photography Association |