.ATR File Extension
File TypeAtari Disk Image
What is an ATR file?
Disk image created on an Atari computer system; contains an exact copy of an Atari 8-bit formatted disk; may be a single or double density image containing 720 or 1440 sectors.
ATR files can be mounted on a PC using an Atari 8-bit computer emulation program like PC Xformer, APE, or SIO2PC.