International Space Command (sometimes referred to as International Space Control) was a human organisation dedicated to exploring space.
It was established as early as 1986 (TV: The Tenth Planet) and continued to exist as late as 2070. (TV: The Moonbase)
Its headquarters were located in Geneva.
The ISC maintained a South Pole base capable of tracking manned atmospheric probes such as the Zeus IV. By 1986, they were flying lunar missions and controlled one of the two or three Z-bombs the Earth possessed. (TV: The Tenth Planet)
It was absorbed by UNISYC in the 2030s. (PROSE: Alien Bodies) In the 2050s, they maintained a Moonbase from which they manipulated the Earth's weather. (TV: The Moonbase)