.AB File Extension
File Type 1Android ADB Backup File
What is an AB file?
Backup file created by adb (Android Debug Bridge), a command-line tool included with the Android SDK; can include both apps, system, and user data from an Android 4.0 or later device; used for saving and restoring device snapshots.
Often AB backups do not include the .APK apps themselves, but only the device's app and system supporting data. For example, you can backup the data of a connected Android device without the APK files by typing the following command:
adb backup -all
This creates the file backup.ab in the current directory. To include the APK files as well, use the following command:
adb backup -apk -all
To restore an AB backup file to the device, type the following command:
adb restore backup.ab
The adb program also includes options to include or exclude other types of data and to specify the backup filename. Consult the ADB documentation for further information.
File Type 2Ambling BookPlayer MP3 File
.AB File Association 2
Audio file used by Ambling BookPlayer, an audio player for Android-based mobile phones; adds the ".ab" extension to a normal .MP3 file (or other audio file) and makes the compound extension ".ab.mp3;" used so that downloaded Ambling BookPlayer files aren't mixed with other audio files played by other music players.
Ambling BookPlayer has a preference named "Add .ab Extension" that controls whether or not the ".ab" extension is added to audio files. You can uncheck this option to disable file extension renaming.
File Type 3DNA Sequence File
.AB File Association 3
Scientific data format used to store DNA sequence information; can be viewed graphically with a chromatogram viewer, which allows for rapid detection of mutations in DNA sequences and other DNA analyses.
Most DNA sequence files use the .ABI extension.
File Type 4Applix Builder File
.AB File Association 4
Project file created with Applix Builder, the the graphical programming module of Applixware Linux development software.