.BAK~ File Extension
File TypeAbiWord Auto-Saved Document
What is a BAK~ file?
Auto-saved document created by AbiWord, an open source word processor; stores a backup copy of the currently-open document; used for recovering documents if the program unexpectedly shuts down.
BAK~ files are named with the original file name plus the ".bak~" extension. For example, myDocument.rtf has the auto-saved document myDocument.rtf.bak~.