Updated: 04/26/2017 by Computer Hope

DAT may refer to any of the following:

1. Short for Digital Audio Tape, DAT was originally developed by Hewlett Packard and Sony as a solution for backing up information on a computer or network. DAT drives and tapes are available in two primary formats, DDS (Digital Data Storage) and DataDAT. DDS drives come in three different types, DDS-1, DDS-2, and DDS-3.

2. A DAT can also be used to describe a PC file or file extension, dat being short for data. For a complete listing of computer file extensions, see our file name extensions index.

3. When referring to a virus protection program such as McAfee, DAT refers to the file used to update the virus protection software with the latest updates.

4. DAT is chat slang for that.

Computer abbreviations, DDS, QIC, Tape drive terms, Virus signature