| ztm | ZTreeWin Macro |
| ztp | Keytek ZapMaster Device Test Plan |
| zvpl | Visual Paradigm License |
| zvx | R&S VNA Setup Data |
| zw1 | EPLAN Project Backup |
| zw2 | EPLAN Project Backup |
| zw3 | EPLAN Project Backup |
| zw4 | EPLAN Project Backup |
| zw5 | EPLAN Project Backup |
| zw6 | EPLAN Parts Backup Data |
| zw7 | EPLAN Dictionaries Backup Data |
| zw8 | EPLAN Configuration Data Backup |
| zw9 | EPLAN Basic Project |
| zwb | Zamurai Mobile Whiteboard Data |
| zwdsp | eXtendable Wad Editor ZWDSP Data |
| zwe | MotionWorks IEC Express Project Archive |
| zwo | Zwift Cycling Workouts Data |
| zx | KGB ZX Spectrum Emulator Snapshot |
| zx82 | Speculator 97 Snapshot |
| zxb | ZX-Blockeditor Metafile |
| zxc | Components Engine Database |
| zxe | ZX-Editor Second Edition Format Data |
| zxl | Immersioni Dive Logbook Data |
| zxs | ZX Spectrum Emulator ZXS Snapshot |
| zxt | Warajevo Tape Image |
| zxu | Immersioni Dive Logbook DL7 Data |
| zyp | Reason Subtractor Synth Instrument Patch |
| zys | Business Integrator Database |
| zzd | ISIS Detailed Convergence Data |
| zzj | ISIS Outputs Matrix Coefficients Data |
