| Z | Unix Compressed File | Compressed Files | 10 | 3 |
| Z0 | ZoneAlarm File | Data Files | 1 | 1 |
| Z00 | Casio WK-3000 Rythm Data | Audio Files | 1 | 1 |
| Z01 | WinZip First Split Zip File |
Compressed Files
| 3 | 1 |
| Z02 | WinZip Second Split Zip File |
Compressed Files
| 3 | 1 |
| Z03 | WinZip Third Split Zip File |
Compressed Files
| 3 | 1 |
| Z04 | WinZip Fourth Split Zip File |
Compressed Files
| 3 | 1 |
| Z05 | WinZip Fifth Split Zip File |
Compressed Files
| 4 | 1 |
| Z06 | WinZip Sixth Split Zip File |
Compressed Files
| 3 | 1 |
| Z07 | Split Multi-volume RAR Compressed File |
Compressed Files
| 6 | 1 |
| Z08 | Split Multi-volume RAR Compressed File |
Compressed Files
| 6 | 1 |
| Z09 | Split Multi-volume RAR Compressed File |
Compressed Files
| 6 | 1 |
| Z1 | ZoneAlarm Mailsafe Renamed Data |
Data Files
| 9 | 2 |
| Z2 | Z-machine Z-code Version 2 File | Game Files | 9 | 2 |
| Z2F | Zoo Tycoon 2 Object File |
Game Files
| 1 | 1 |
| Z3 | Z-machine Z-code Version 3 File |
Game Files
| 5 | 1 |
| Z32 | ZAR32 Progress Data Save File |
Data Files
| 1 | 1 |
| Z3D | ZModeler 3D File | 3D Image Files | 2 | 2 |
| Z4 | Z-machine Z-code Version 4 File |
Game Files
| 6 | 2 |
| Z5 | Z-machine Z-code Version 5 File |
Game Files
| 5 | 1 |
| Z6 | ZoneAlarm Mailsafe Renamed Data |
Data Files
| 4 | 1 |
| Z64 | Japanese Nintendo 64 Game ROM |
Game Files
| 5 | 1 |
| Z7 | Z-machine Z-code Version 7 File |
Game Files
| 1 | 1 |
| Z80 | TI-83 And 84 Plus Calculator File | Uncommon Files | 1 | 1 |
| Z9 | ZoneAlarm Mailsafe Renamed Data |
Data Files
| 4 | 1 |
| Z96 | Split Multi-volume RAR Compressed File |
Compressed Files
| 6 | 1 |
| ZA | nFusion Game Data |
Game Files
| 3 | 1 |
| ZAB | Zipped Audio Book |
Audio Files
| 2 | 1 |
| ZABW | Compressed AbiWord Document File | Text Files | 1 | 1 |
| ZAC | Spirit Architectural Component File |
Data Files
| 1 | 1 |
| ZAD | ZadGen Document File |
Text Files
| 5 | 2 |
| ZAE | ZAwinEHE Project |
Data Files
| 1 | 1 |
| ZAF | Zoom Audio Data |
Audio Files
| 1 | 1 |
| ZAK | Sight Survey Job Data |
Data Files
| 1 | 1 |
| ZAL | Uncommon File Extension |
Uncommon Files
| 1 | 1 |
| ZAM | ZTreeWin Application Menu File |
Data Files
| 1 | 1 |
| ZAP | ZoneAlarm Pro Data File |
Data Files
| 5 | 3 |
| ZAP13 | Siemens TIA V13 Archived Project | Backup Files | 1 | 1 |
| ZAR | PlayStation 2 Audio Data |
Game Files
| 2 | 2 |
| ZARGO | ArgoUML Model | Developer Files | 1 | 1 |
| ZAX | Zaxcom Audio Data |
Audio Files
| 1 | 1 |
| ZBA | Compressed Data File |
Compressed Files
| 1 | 1 |
| ZBD | Canon Zoom Browser Database |
Data Files
| 1 | 1 |
| ZBF | RADIANCE Z-Buffer Format |
Data Files
| 2 | 2 |
| ZBI | Zebra ZBI-Developer Project |
Uncommon Files
| 2 | 2 |
| ZBJ | Uncommon File Extension |
Uncommon Files
| 1 | 1 |
| ZBR | Zoner Zebra Metafile File | Graphic Files | 1 | 1 |
| ZBS | Super-K Data |
Data Files
| 1 | 1 |
| ZBX | Disk Volume Identification |
Uncommon Files
| 1 | 1 |
| ZC | Zipkey Configuration | System Files | 1 | 1 |
| ZCF | ZCF.Document Files |
Uncommon Files
| 1 | 1 |
| ZCH | ZIG Game Construction Kit Data |
Uncommon Files
| 1 | 1 |
| ZCN | OmniPage OCR File |
Data Files
| 1 | 1 |
| ZCS | File Extension .zcs |
Uncommon Files
| 1 | 1 |
| ZD2 | Zillions of Games Locked Rules |
Data Files
| 1 | 1 |
| ZDB | Zimbra Database File |
Data Files
| 7 | 6 |
| ZDE | Uncommon File Extension |
Uncommon Files
| 1 | 1 |
| ZDF | Zone Definition File |
Data Files
| 1 | 2 |
| ZDG | ZiffNet ZView Compressed Document File |
Text Files
| 1 | 1 |
| ZDI | Uncommon File Extension |
Uncommon Files
| 1 | 1 |
| ZDK | ZQuake Game Data |
Game Files
| 1 | 1 |
| ZDL | Avery DesignPro Label File | Page Layout Files | 1 | 1 |
| ZDP | Avery DesignPro Label File |
Page Layout Files
| 1 | 1 |
| ZDS | Avery DesignPro Label File |
Page Layout Files
| 2 | 2 |
| ZDT | ZDT Data |
Data Files
| 1 | 1 |
| ZDX | Avery Design Clipart Index |
Data Files
| 1 | 1 |
| ZEB | Unknown File Type |
Uncommon Files
| 1 | 1 |
| ZED | ZX-Edit Document Block File |
Text Files
| 2 | 2 |
| ZEI | ANNO 1602 Game Data |
Game Files
| 1 | 1 |
| ZEL | Zel MIDI Source File |
Audio Files
| 1 | 1 |
| ZEPTO | Zepto Virus File | Encoded Files | 1 | 1 |
| ZER | Zerberus Data File |
Data Files
| 1 | 1 |
| ZERO | Zero Compiler Project |
Text Files
| 2 | 1 |
| ZET | ZET Compressed Archive |
Compressed Files
| 1 | 1 |
| ZEX | ZOOM MRS-802 System File |
System Files
| 1 | 1 |
| ZEXP | Zope Binary Export File Data File |
Data Files
| 1 | 1 |
| ZFC | Back4Win Backup Archive File |
Compressed Files
| 1 | 1 |
| ZFD | ABC Zeroadic Functions Data |
Developer Files
| 1 | 1 |
| ZFO | XSL-FO Online Form | Web Files | 1 | 1 |
| ZFS | Interstate '76 And '82 Game Archive File |
Game Files
| 2 | 1 |
| ZFSENDTOTA | Unknown File Type |
Uncommon Files
| 1 | 1 |
| zfsendtotarget | Windows XP ZIP Compressed Folder |
Compressed Files
| 2 | 1 |
| ZFX | ZipForm File |
Page Layout Files
| 2 | 2 |
| ZGEPROJ | ZGame Editor Project File |
Game Files
| 1 | 1 |
| ZGF | Landmark Zycor Graphics File |
Uncommon Files
| 1 | 1 |
| ZGM | Zenographics Image File | Vector Image Files | 1 | 1 |
| ZGZ | Unknown File Type |
Uncommon Files
| 1 | 1 |
| ZH | Netscape Communicator Java Classes File |
Data Files
| 1 | 1 |
| ZH3 | Unknown File Type |
Uncommon Files
| 1 | 1 |
| ZHS | ECLIPSE Server Hotspot File | Settings Files | 1 | 1 |
| ZIB | ZX-Editor Graphic Library File |
Text Files
| 1 | 1 |
| ZID | Zoo/PhytoImage Data File |
Data Files
| 1 | 1 |
| ZIF | Zooming Image Format File | Raster Image Files | 1 | 1 |
| ZIG | ZigGIS Data |
Data Files
| 1 | 1 |
| ZIM | OpenZIM Wiki Archive |
Data Files
| 1 | 1 |
| ZIN | Zindo Input Data |
Data Files
| 1 | 1 |
| ZIP | Zipped File |
Compressed Files
| 14 | 3 |
| ZIP2 | StuffIt Archive |
Compressed Files
| 5 | 1 |
| ZIPENX | Egis Encrypted ZIP File |
Encoded Files
| 1 | 1 |
| ZIPX | Extended Zip File |
Compressed Files
| 5 | 1 |
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