| Word | Description |
| IDX | IDX is a subtitle file format for digital video. |
| IFO | IFO is a DVD InFOrmation file that stores information about Chapters, Subtitles and Audio Tracks. |
| IMG | A CD or DVD image file, essentially equivalent to an ISO file. On such a file, simply changing the extention from IMG to ISO can make it usable as the latter by most programs. |
| IP cam | IP cameras are Closed-circuit television (CCTV) cameras that use Internet Protocol to transmit image data and control signals over a Fast Ethernet link. As such, IP cameras are also commonly referred to as network cameras. IP cameras are primarily used for surveillance in the same manner as analog closed-circuit television. |
| ISO | An ISO image is an archive file (also known as a disk image) of an optical disc in a format defined by the International Organization for Standardization (ISO). |