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| Extension | File Type Developer | File Category | File Type Description | Primary Software | Primary Software Developer |
|---|---|---|---|---|---|
| .VSR | Microsoft Corporation | Database Files | Microsoft Access Report | Microsoft Access | Microsoft Corporation |
| .VVV | SourceForge | Database Files | Virtual Volumes View Catalog | VVV (Virtual Volumes View) | SourceForge |
| .W5S | Radionomy | Database Files | Winamp CDDB Database File | Nullsoft Winamp | Nullsoft |
| .WB | Electronic Arts | Database Files | FIFA 2000 Game Data | FIFA 2000 | Electronic Arts |
| .WDB | Microsoft Corporation | Database Files | Microsoft Works Database | LibreOffice | The Document Foundation |
| .WMDB | Microsoft Corporation | Database Files | Windows Media Database File | Microsoft Windows Media Player | Microsoft Corporation |
| .WRK | Cakewalk, Inc. | Database Files | Cakewalk Music Project | Cakewalk SONAR | Cakewalk, Inc. |
| .WZS | Microsoft Corporation | Database Files | Microsoft Word Wizard | Microsoft Office | Microsoft Corporation |
| .XDB | Symantec Corporation | Database Files | Symantec Virus Database File | Symantec EndPoint Protection 12 | Symantec Corporation |
| .XGO | GeoConcept SA | Database Files | GeoConcept Add-on | GeoConcept | GeoConcept SA |
| .XLD | Microsoft Corporation | Database Files | Excel Database File | Microsoft Excel | Microsoft Corporation |
| .XPP | Microsoft Corporation | Database Files | X++ Source Code File | Microsoft Dynamics AX | Microsoft Corporation |
| .XSS | Oracle Corporation | Database Files | XML Style Sheet | Microsoft Visual Studio | Microsoft Corporation |
| .YMA | YMAG s.a.s. | Database Files | YMAG Center Data Exchange File | YMAG Center | YMAG s.a.s. |
| .ZDB | Synacor Inc. | Database Files | Zimbra Database File | Microsoft Outlook | Microsoft Corporation |
| .ZOT | Check Point Software Technologies Ltd. | Database Files | Zone Alarm Mailsafe Renamed File | ZoneAlarm Pro | Check Point Software Technologies Ltd. |
| .ZPI | Winrar | Database Files | Zipped File | 7-Zip | Igor Pavlov |
| .ZRD | Zemax | Database Files | ZEMAX Ray Database | ZEMAX | Zemax |
| .ZYS | Pervasive Software | Database Files | Business Integrator Database | Pervasive Data Integrator | Pervasive Software |
| .~AP | Micro Focus International plc | Database Files | Borland C++ Old AppExpert Project Database File | Borland C++ | Micro Focus International plc |
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