What does BUG stand for?

What does BUG mean?

BUG	Bugs and Problems Computing » File Extensions
BUG	Backpackers Ultimate Guide Community » Sports
BUG	Buginese Regional » Language Codes (3 Letters)
BUG	Bicycle Users Group Community » Sports
BUG	Bicycle Users Group Miscellaneous » Hobbies
BUG	Back Up Gun Governmental » Police
BUG	Bringing Up Grades Community » Educational
BUG	Bus Users Group Computing » Software
BUG	Bring Up Grades Academic & Science » Universities
BUG	Big Urban Game Governmental » Police
BUG	17th of November Airport, Benguela (Benguella), Angola Regional » Airport Codes
BUG	Brought Up Grades Academic & Science » Universities
BUG	Being Unusually Good Community » Law
BUG	Bluegrass Ultralight Group Community » Media
BUG	Blackboard Users Group Computing » Software
BUG	Brought Up Grade Academic & Science » Universities
BUG	Backpacker's Ultimate Guide Community » Sports
BUG	Bridging the Usability Gap Computing » Software
BUG	Bucharest Under Ground Community » Media
BUG	Being Unusally Good Community » Educational
BUG	Birmingham Users Group Computing » Software
BUG	British Urban Gear Business » Firms
BUG	Bye Until Graduation Academic & Science » Universities
BUG	Best Underwater Guppies Business » Firms
BUG	Buderim Ginger Ltd Business » ASX Symbols