It was the operational focus of the room. (Star Trek: The Next Generation) The unit was affectionately known by production astaff as the "pool table." It was previously used as a console in Star Trek IV: The Voyage Home in Starfleet Command, San Francisco. (Star Trek Encyclopedia 2nd ed., p. 291) It made its first appearance in "Where No One Has Gone Before" . The Sovereign class USS Enterprise-E also had a similar table located between the main entrance to engineering and the warp core. (Star Trek: Insurrection) Starbase 74 also used a master systems display table in 2364. (TNG: "11001001" )