The first computer my brother and I ever had access to was a Wang, I have no idea what operating system it ran. I was 6 or 7 at the time. I'm pretty sure that's the machine we used to play this game, as well as our own instance of Trade Wars, when we weren't logged into Argus BBS over the 1200 baud.
OK, so this game we played. It was like a explore and conquer game, there was a list of worlds I think they were named Alpha, Beta, Gamma, etc. You could choose to send different types of ships to try to capture and control the various worlds, in which case it would contribute to your overall production. I recall there was a way to send spies as well, that would relay information about what kind of units were present on an enemy territory. I recall it being similar in some ways to Galactic Empire, except it was purely turn based, there was no real time component.
I can't for the life of me remember the name of the game. I'm half convinced I dreamed the whole thing up. Any chance this rings a bell for anyone?