| biu | BidMaker 2002 Update |
| biv | IsoBIVMV Data |
| bix | Biblook Index Data |
| biz | Microsoft BizTalk Compatible Schema Data |
| bizdesign | Actuate BusinessReport Studio Design Document |
| bizdocument | Actuate BusinessReport Studio Document |
| bjb | z/VSE System Binary Job Data |
| bjf | NTI Backup Now Backup Job |
| bjg | DESQview Data |
| bjk | Blaise Database BJK Data |
| bjs | Moldex3D Batch Job Settings Data |
| bjson | Binary JSON Data |
| bk | Movie Magic Screenwriter Document Backup |
| bk | Power Chess Book Data |
| bk0 | Aspen HYSYS Backup File |
| bk1 | Aspen HYSYS Backup File |
| bk1 | CA ERwin Data Modeler Backup |
| bk1 | FlashGet Database Backup |
| bk1 | Windows Indexing Service Data |
| bk2 | Aspen HYSYS Backup File |
| bk2 | Cashbook Complete Automated Backup Data |
| bk2 | FlashGet Database Backup |
| bk2 | Windows Indexing Service Data |
| bk3 | Cashbook Complete Automated Backup Data |
| bk3 | Cashbook Complete Company Data |
| bk3 | FlashGet Database Backup |
| bk4 | FlashGet Database Backup |
| bka | Oracle Enterprise Manager OMS Backup Data |
| bkb | VariCAD Block File |
| bkj | Symantec Backup Exec Job |
| bkl | KeyCarbon Binary Keystroke Log |
| bkmk | Internet Explorer Bookmark Data |
| bkmk | Yummy FTP Pro Bookmark |
| bkp | Steinberg WaveLab Backup Plan |
| bkr | BK ReplaceEm Fileset |
