| bdct | BBEdit Dictionary Data |
| bdd | CARA Sound Radiation Data |
| bde | Active-HDL Block Diagram |
| bde | PTC Creo BDE File |
| bdf | Brother Embroidery Software Design Data |
| bdf | BSDiff Patch |
| bdf | EMail Detective Binary Data Fragment |
| bdf | Nastran Bulk Data |
| bdf | Oasys T/HIS Bulk Data File |
| bdf | Okino NuGraf Transfer Data |
| bdf | SmartWare Backup Definition Data |
| bdf | TXRDWIN X-ray Diffraction Pattern |
| bdf | West Point Bridge Designer Data |
| bdg | Badge Designer 2000 Data |
| bdg | BudgetExpress Data |
| bdi | PTC Creo BDI File |
| bdic | Google Chrome Dictionary |
| bdl | CoCreate Bundle Data |
| bdl | Gamecube BDL Model Data |
| bdm | Blaise Data Model |
| bdm | PTC Creo BDM File |
| bdmv | Blu-ray Disc Information File |
| bdoc | DigiDoc BDOC Digital Signature |
| bdp | Microsoft Exchange Non-Delivery Report Bad Mail Pointer |
| bdr | Microsoft Exchange Non-Delivery Report Body |
| bds | Active-HDL Symbol Sheets Data |
| bdsdeploy | Borland Developer Studio Deployment Data |
| bdt | ABBYY Lingvo Dictionary Text |
| bdt | Beedocs Timeline 3D Document |
| bdt2 | Beedocs Timeline 3D Document |
| bdt3 | Beedocs Timeline 3D Document |
| bdv | Blaise Dataview File |
| bdw | Budget for Windows Data |
| bdx | BarBack Drink Exchange Data |
| bdx | Bitdefender BDX Data |
