Thats what we all said about Keanu. He was a joke at the time. Or rather basically type cast. Even in the more serious roles he was pretty goofy. Speed comes to mind. The Matrix gave me and many i know a bigger liking for the young silly Ted Logan.
It's correct when written because acronyms are representing the words they abriviate. In this case an unidentified object. If you where to speak the acronym than just "a" is correct because you are saying the letter "U" not the word "unidentified". Does that make sense? Different rules for written and spoken.
I bet the code is cracked within the hour of every update from now until eternity. It's like the shit physical locks we put on everything. Nothing but a display of safety.
The purpose of a system is what it does?