| Abbreviation | Definition |
|---|---|
| ZUN | Recogsp File |
| ZVD | Z-Fax Zyxel Voicefile |
| ZVW | Z-axis: The Next Generation file |
| ZW | Chinese text |
| ZWB | Zortech 21 Readme File |
| ZWL | WinLabel Version 3.0 Label |
| ZYX | ZyXEL Voice Format file |
| ZZ | ZZip Compressed Archive |
| ZZE | Encoded file archive (ascii) |
| ZZM | ZZT Music Player |
| ZZT | ZZT Game Creation System |
| ZZZ | Micro Perfect Products Sleep Mode |