MCU: 10 Fascinating Facts Behind Avengers: Age Of Ultron (2015)

3. Tony's Other AIs

When JARVIS ends up lost and seemingly destroyed by Ultron after Tony and Bruce stupidly unleash the new creation on the world without a firewall, Stark is left with a vacancy for a new AI in his Iron Man suit. It turns out that JARVIS has merely cleverly hidden himself in an effort to help thwart Ultron, but when he does return, he gets his evolution by turning into Vision and Tony is still left without a digital helper.

In the sequence in which he picks FRIDAY as JARVIS' replacement, it's actually revealed that Stark has developed a number of AIs. One is named TADASHI in honour of Big Hero 6's tragic older brother figure Tadashi Hamada, whose name is also the AI chip that powers Baymax.

The other is called JOCASTA in honour of the android Ultron created in the comics and eventually married. Probably for the best that Tony didn't pick that one.