imdb.com/title/tt0064177/
A guy at work brought this in. Pretty fun!

From 1970, it's about a suercomputer that is made to take control of our missles, so someone having a bad day doesn't push the button. But it turns out to be a little smarter than they planned. And it finds a counterpart to itself in the USSR. They get together, and... Oh well, I'll let you see for yourself. heh.