J.O.C.A.S.T.A.

Jocasta is a A.I. back-up A.I. program created by Tony Stark

History
When Tony is looking through his old AI chips, one of them is marked "Jocasta." He instead chose F.R.I.D.A.Y. after J.A.R.V.I.S.' uploading into Vision.

Trivia

 * In the comics Jocasta was the robotic bride of her creator by Ultron.