| mb1 | Math Blaster 1 Data |
| mb1 | UltraEdit Menus Data |
| mba | Martus Human Rights Bulletin System Data |
| mba | MyBoard Activity Data |
| mbak | Quantrix Modeler Backup Data |
| mbb | CARAIBES Bathymetric Data |
| mbbackup | Modelbench Backup Data |
| mbc | Mulberry E-mail Client Cache |
| mbdata | Modelbench Scene Data |
| mbdb | iTunes Backup Manifest Database |
| mbdx | iTunes Backup Manifest Database |
| mbg | CARAIBES Georeferenced Depth Data |
| mbg | Microsoft Mail Mailbag |
| mbj | Yamaha EffectGear Data |
| mbk | dBASE IV Multiple Index Backup |
| mbl | Multi-Batch Batch List |
| mbl | Vernier Logger Pro Data |
| mblanguage | Modelbench Language Data |
| mbn | Samsung Galaxy Multi Boot Image |
| mbn | Sony-Ericsson Phone Main Firmware |
| mbox | Unix Mailbox |
| mbp | Mobipocket Reader Data |
| mbp | Modbus Poll Data File |
| mbp | MyBackup Pro Database |
| mbs | Micrografx Picture Publisher Brush Shape |
| mbs | Opera Mail Mailbox |
| mbsa | Microsoft Baseline Security Analyser Report |
| mbsb | Mamut Enterprise Database Backup |
| mbsyncstate | mbsync Folder Backup |
| mbt | ecBuilder Template |
