| dat | Inno Setup Uninstall Data |
| dat | Nero BackItUp Drive Image |
| dat | Radiance Data File |
| dat | Shareaza Thumbnail Data |
| dat | SPOT Satellite Image Format Data |
| dat | SVAL Frequency-time Spectrogram Data |
| dat | SWAT Database |
| dat | Tecplot ASCII Data |
| dat | Treepad Database |
| dat | Windows Registry Hive Data |
| dat-shm | eM Client SHM Data |
| dat-wal | eM Client WAL Data |
| dat2 | XYplorer Thumbnail Cache |
| data | Adobe Soundbooth Audio Data |
| data | Analysis Studio Data |
| data | Apple Photos Data |
| data | CoreFSIF Database |
| data | General Data File |
| data | NASA VIRV Instruments Status |
| database | Serato DJ Database |
| datbak0 | Miranda IM Data Backup |
| datd | Daily Aggregated Traffic Data |
| datr | DATR Data |
| datt | STK Processed Intermediate Terrain File |
| datx | Canon EOS Utility Data |
| dau | NCH Express Dictate Record Data |
| dau | SPSS Overflow Data |
| dawn | DAWN Science Data |
| dax | OrangeCD Theme Data |
| day | WRAP DAY Output Data |
