T.A.D.A.S.H.I.

T.A.D.A.S.H.I. is a back-up A.I. program created by Tony Stark.

History
When Tony Stark was looking through his old A.I. chips, one of them was marked "T.A.D.A.S.H.I.". Instead of choosing T.A.D.A.S.H.I., Stark opted to choose F.R.I.D.A.Y. in order to replace J.A.R.V.I.S., who had been uploaded into Vision.

Trivia

 * T.A.D.A.S.H.I.'s name is a reference to Tadashi Hamada, a character from Big Hero 6, who created the A.I. program for Baymax.