.ADF File Extension

Disk image created on an Amiga system; stores an exact copy of an Amiga-formatted disk in fixed-width AmigaDOS data tracks; can be mounted as a physical disk using an Amiga emulation program.

ADF files can be created on a Windows PC using ADF Opus.

Database file created by ACT!, a customer relationship management (CRM) application; contains customer contact data such as names, email addresses, business information, and the relationship history; used for customer relations information in a structured format.

ADF files are saved with an .ALF lookup file, which contains metadata required to navigate, backup, and restore the ACT! database. ADF files may also be archived within ACT! database backups, which use the .BAK extension.

NOTE: ADF files use Microsoft SQL Server formatting and are similar to .MDF files.