EZ-Track Plus software for Atari ST computers. This is a MIDI Sequencer made by Hybrid Arts in 1988 and comes in the original folder with original 3.5" disk and user manual (second edition) and also some papers like order form and product sheets for other releases. Please note the previous owner wrote their name and info in black marker on the inside of folder. Software is untested and sold as-is for collectible purposes. The item appears to be clean and well taken care of so hopefully it still works.