UIF files, short for Universal Image Format, is a proprietary CD/DVD disc image format that uses compression created by the company MagicISO. Because of this, it is very similar to DAA.
Besides compression, UIF supports data encryption, password addition, integrated MD5 checksums and even multi-session CD/DVD, AudioCD, VCD, SVCD and DVD-Video.
Unfortunately, UIF cannot be mounted with standard freeware programs such as Daemon Tools.