The USS Enterprise (NCC-1701-D) library computer was the library computer of the USS Enterprise-D. It could either be accessed using stations on the bridge of the starship or from a panel built into the right arm of the bridge's command chair. (TNG: "The Naked Now", "Encounter at Farpoint")
Several times in early 2364, people and aliens accessed the Enterprise-D's library computer banks to retrieve important information.
While researching the symptoms of the polywater intoxication, Data did some research in the library banks of the ship. (TNG: "The Naked Now")
Portal 63 of the Tkon Empire scanned the complete computer banks of the ship a short time later. (TNG: "The Last Outpost")
Lore went through a massive number of computer files when he was first discovered by the crew of the Enterprise-D. (TNG: "Datalore")
At the end of the year, Data again did some research using the comnet database searching for hints pointing towards a conspiracy in high levels of Starfleet Command. (TNG: "Conspiracy")