Well, I was hoping to teach my daughter a history lesson with Tron but it didn't go over so well. She was (somehow) thinking that you had to know about computers to understand it. Well, as *we* all know Disney movies are not anything like real life and take it as entertainment.
Now for the trivial part:
Who knows what computer Flynn used to remotely connect to the MCP's systems to look for the "scuzzy data"?
It wasn't a Mac but it was an Apple /// with a Silentype printer.
Most obvious question in the movie:
MCP to Dillinger: "Where can we find Flynn?"
Just 3 minutes before this we were treated to a shot of the arcade where Flynn connected to the system. It has a giant neon sign that says "Flynn's",
Maybe the MCP needs a phonebook, or google.