The library computer banks of USS Defiant contained information from the Starfleet database.

In 2268 an image of Exo III appeared on a view screen near the starship's Sickbay. (TOS: "The Tholian Web")

After the Defiant entered the mirror universe, Jonathan Archer accessed the library computer to learn of the history of the Federation that the ship came from. He also viewed the personnel files of his counterpart and Hoshi Sato's counterpart. (ENT: "In a Mirror, Darkly, Part II")

Images seen in the library computer