What does CB. stand for?

What does CB. mean?

CB	Cummulative Bulletin Business » Accounting
CB	ChargeBack Business » Accounting
CB	Catch Basin Academic & Science » Architecture
CB	Count Of Bytes Computing » Assembly
CB	Companion, Order of the Bath Miscellaneous » Awards & Medals
CB	Central Bank Business » Banking
CB	Commonwealth Bank Business » Banking
CB	Cute Boy Internet » Chat
CB	Chat Board Internet » Chat
CB	Clueless Boy Internet » Chat
CB	Ciao Baby Internet » Chat
CB	Conduction Band Academic & Science » Chemistry
CB	Chromakey Blue Miscellaneous » Colors
CB	Community Board Community
CB	Coloring Book Community » Educational
CB	Carbon Black Academic & Science » Electronics
CB	Circuit Breaker Academic & Science » Electronics
CB	Conduction Band Academic & Science » Electronics
CB	Count Basie Community » Famous
CB	Carl Bevil Community » Famous
CB	Charles Bathhurst Community » Famous
CB	Colin Bryan Community » Famous
CB	Chris Bennett Community » Famous
CB	Charlie Brown Community » Famous
CB	Microsoft clean boot file Computing » File Extensions