| zmt | MOPAC Z-Matrix Molecule Data |
| zmx | Zemax Lens Data |
| zna | Zinio Annotation File |
| znc | Zinc Emulator Plugin |
| zncn | RMCProfile Zinc Neighbours Data |
| znl | Number Lines Lesson Data |
| znm | ZBrush NoiseMaker Data |
| znt | SigmaWin+ Zone Table Data |
| znx | RS ZND Vector Network Analyzer Data |
| zn~ | Zinio Reader Temporary Data |
| zof | Zemax Object Format File |
| zol | Zoll RescueNet Code Review Data |
| zon | OmniPage Zone Template |
| zon | Verity Collection Building Custom Zone |
| zone | ISC Bind Zone Data |
| zoommtg | Zoom Meetings Data |
| zor | Zortam Mp3 Media Studio Library |
| zot | Zoot Information Processor Database |
| zpa | Vielklang Audio Metadata |
| zpac | Marvelous Designer 3D Garment |
| zpc | ZappR Compiled Patch |
| zpic | Zoom Player Install Center Text Data |
| zpicd | Zoom Player Install Center Component Database Text |
| zpk | ShipRush Shipping Template |
| zpl | Zemax Programming Language Source Code |
| zpr | ZappR Patch |
| zprj | ArcSoft Print Creations Template |
| zpx | MapOCX Pro Data |
| zrc | Rainlendar Compressed Resources File |
| zrd | Zemax Ray Database File |
| zre | ISOMAP Import Data |
| zri | RISC OS ROM Image |
| zrl | ZR FileWorks List |
| zs* | eXtendable Wad Editor ZS* Data |
| zs0 | ZSNES Save State |
