What is "fly!"

Fly! is a flight simulator for PC and Apple Macintosh computers developed by Terminal Reality and published by Gathering of Developers. It includes simulation of air traffic control features as well as aircraft's on-board systems, and was acclaimed for its highly detailed fully working interactive cockpits. Featured aircraft were exclusively fixed-wing light to medium aircraft. An enhanced version, Fly! 2K, and add-on, Wilco's 737 for Fly!, were released in 2000. A sequel, Fly! II, was released in 2001.