The tablelike master systems display console in the middle of Main 
Engineering is actually the same unit, refurbished, that was used by Admiral 
Cartwright and company in Starfleet Command in the movie Star Trek IV: The 
Voyage Home. It was first used aboard the Enterprise-D in ÒWhere No One 
Has Gone BeforeÓ (TNG), although in that first appearance it had a glowing 
white tabletop. Most Star Trek production staffers have taken to informally 
referring to it as Òthe pool table.Ó  Æ