The funny thing is that, unlike fake UI in other movies, this was indeed a real demo for silicon graphics computers: http://www.sgistuff.net/funstuff/hollywood/jpark.html
Towards the end of the movie the kids use the computer to lock the doors. This is the great moment of fsn (“fusion”) the File System Navigator which is a real demo application and was not written for the movie. A binary was available from the official Silicon Graphics website for a long time.
It was a real 3D filesystem navigator, which may sound like a bad idea, that’s because it was a bad idea.
For the time it came out it looked pretty cool at least, which at least all was needed for the movie. I remember reading up years later how it was an actual program which I thought was pretty neat, they spared no expense in their computer visuals heh. After actually working in enterprise systems I do understand how awful that’d be to work with.
