Crossword Genius

The "C" in UPC (4)

Ross

I believe the answer is:

code

'the c in upc' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for code that I've seen before include "Program instruction" , "Set of signals for sending messages" , "See 12" , "Method of encryption or set of rules" , "System of rules" .)

I've seen this clue in the Universal and the USA Today.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.