Is J.A.R.V.I.S, Iron Man's electronic assistant, an example of A.I (artificial intelligence)?
He seems like it, but in Age of Ultron when describing how Ultron is an actual AI, Tony Stark proclaims that Jarvis is an incredibly sophisticated program that mimics sentience very well, but does not actually meet the conditions for full AI (i.e. sentience).
The whole point of The Vision being "not Jarvis" even though he sounds like Jarvis and originates from Jarvis's code is that he's been augmented with actual AI, giving him consciousness that he did not have before, resulting in a new "being". If Jarvis were already an AI, none of this would make sense.
Mind you, what constitutes "AI" is subject to interpretation.
JARVIS is not an AI system of Tony Stark but indeed a revolutionary invention of Howard Stark, the father of Tony Stark. JARVIS is an updated feature of Arsenal, and artificial robot, which was made by Howard Stark to look after his son, Tony.