When I was a kid in the early 90s (in Czechoslovakia), I watched Wargames and Short Circuit, and they influenced me a lot to become interested in artificial intelligence. I found the idea of intelligent computers fascinating. Although the anti-war message in these movies sorta went over my head at the time.

I still like Wargames today, although I appreciate very different things about it. I also really like the library montage, which just so nicely captures the effort sometimes needed to solve a problem.