One of my faves. Cheesy sets, of course, but cool back in the day before anybody knew what a computer should look like. Real dystopian ending, as well.
Watched this on a whim in December. It was a fantastic movie and I recommend it to anyone
One of my all time favorites. The final monologue drops the mic!
Original books are classics too.
If you like Colossus, I recommend also Demon Seed (1977)