Self-Aware Megalomaniacal Computer Storage at the Daystrom Institute
A megalomaniac was someone who was obsessed with self-importance and power.
In 2375, Tom Paris advised Kathryn Janeway, alias "Queen Arachnia", to appeal to Doctor Chaotica's ego when attempting to win his favor, as he was a megalomaniac. (VOY: "Bride of Chaotica!")
Self-aware megalomaniacal computers were common foes for Starfleet, to the point that the Daystrom Institute in Okinawa had a dedicated facility for their study and safe storage. In 2381, AGIMUS was moved to the facility. (LD: "Where Pleasant Fountains Lie")