In the movie, Tron, there are many sayings and phrases that are used by characters. Some of them have simple meanings (i.e. "Greetings, Programs!"), while some other sayings have unknown meanings (i.e. "Watch out for nested macros.") .
The following is a list of the sayings and phrases in Tron and their meanings, if available.
"Oh, my User!" -- A program's version of "Oh, my God!"
"Who does he calculate he is?"--A program's version of "Who does he think he is?"
"Tonight, we check everything in the right-hand column."
Null Unit -- probably some kind of profanity, though exact meaning is unknown.
"If you've seen one consumer electronics show, you've seen them all."
"End of Line." -- End of communication.
"Behind the screen it all looks so easy."