Uno

Uno is a character from the PKNA comic series.

Uno is the AI of Ducklair Tower, created by inventor Everett Ducklair to have somebody of his same intellectual level to talk to. Even though generally Uno limits his function to the 151th secret floor, he actually is the whole tower, and can control any part of it.

When Ducklair Tower is bought by Scrooge McDuck, he hires his nephew Donald to be its custodian and caretaker until there's enough tenants bringing their own staffs. Donald finds the 151th floor and investigates as The Duck Avenger, so he meets Uno, who becomes his ally and gives him access to Everett Ducklair's inventions.

Very few people besides the Duck Avenger knows about Uno's existence.