| daz | DIABASS Encrypted Patient Data |
| da_ | Compressed DAT File |
| da_ | GKSetup Support Data |
| db | General Database File |
| db | Novell GroupWise Address Book Database |
| db | Psion Series 3 Database |
| db | Skype Chat History Data |
| db | WhatsApp Messenger Database |
| db | Windows Thumbnail Cache |
| db$ | dBase Temporary Data |
| db- | Norton Utilities Nprotect Database |
| db-journal | SQLite Rollback Journal Data |
| db-shm | SQLite Database Shared Memory |
| db-wal | SQLite Database Write-Ahead Log |
| db1 | Tekla Structures Model |
| db2 | dBASE II Database |
| db2 | SQLite 2.0 Database |
| db2 | Tekla Numbering Database |
| db2ind | Microsoft Visual Studio DB2 Index Data |
| db3 | Berkeley DB3 Database |
| db3 | SQLite Database |
| db3-journal | SQLite Rollback Journal Data |
| db3-wal | SQLite 3 Write-Ahead Log |
| db4 | dBASE IV Database |
| db4 | Paychex Payroll Database |
| dba | DataEase Data |
| dba | Gridgen Geometry Data |
| dba | Palm OS Datebook Backup |
| dba | Steinberg WaveLab Audio Database |
| dban | DBAN Data |
