Backup of a database created with Microsoft Dynamics NAV; contains financial data used for business management and analysis; can be used to restore data if the primary database (.FDB) file becomes corrupted or is deleted.
Microsoft Dynamics NAV was previously called Microsoft Navision.
File used by AutoCAD Civil 3D, a BIM (Building Information Modeling) program used for civil engineering design; saved in a plain text format and stores observed point data; can be imported into a drawing.
FBK files can be created from raw survey files in AutoCAD Civil 3D. The converted data can then be imported into a design or drawing.
Compressed backup of a family tree (.FTW) file created with Family Tree Maker for Windows; may be created as a backup file in case the original family tree file is damaged or deleted; can be restored by selecting "File→Restore From Backup" within Family Tree Maker.
NOTE: Family Tree Maker for Windows uses the ".fbk" file extension, while Family Tree Maker for DOS saves backups as .FBC files.