IASA was an organization that existed on the planet Earth after the Taelons arrival.

It was a Human agency that sought to send pilots to the different worlds within the solar system and had a project to put a crew on the surface of Mars. However, the project was cancelled under the direction of President Thompson which left one of its pilots, Paul Chandler, furious over what he percieved as Companion involvement in the program. (Episode: Horizon Zero)