Digital audio format used by Audible to store audio books; designed for storing spoken word audio and supports chapter markers, bookmarks, etc; Audible files are supported by the Apple iPod, Creative Zen, SanDisk Sansa, various GPS devices, and the Amazon Kindle.

AA audio files can be converted to the more compatible .MP3 format using a program like Tunebite, TuneCab, or SoundTaxi Media Suite.

Generic disc image created by a disc imaging program; stores an exact replica of a hard disk or other type of media; basically an .ISO file with a different file extension.