What they had to work with was basically the studio owned props, which were the guns and uniforms and the rented props which were computer terminals and vehicles and some set decorations. Modern Props did a brisk bit of business with Universal on alot of its scifi shows so that is why alot of computer terminals and data banks look familiar. They simply reused rentals that were seen in other shows like Buck Rogers and Battlestar. When they could save money by using prebuilt hand props from their own vaults then they would.
Correct....I think the sci-fi prop rental business kicked into high gear in the late 70s and early 80s. While Universal owned a large amount of hardware of their own, they did rent quite a bit. Didn't Modern Props actually go into busniess around 78 or 79?