Initialism of Before Christ.

British Columbia, a Canadian province. / Baja California, a Mexican state. / Initialism of Boston College.

Initialism of birth control. / (chemistry) Initialism of benzalkonium chloride. / (US, navy) Initialism of battlecruiser. / (computer science) Initialism of backward compatibility.

Initialism of best-case scenario. / (American football, historical) Initialism of Bowl Championship Series. Replaced after the 2013 season by the College Football Playoff.

Alternative letter-case form of BC (Before Christ)

(Internet slang) Alternative form of b/c: because.

(music) basso continuo / (law enforcement) bodycam / Initialism of blind copy, a shortening of blind carbon copy

plural of BC

folic acid

(chronology) Initialism of Before Common Era (Before the Common Era, before Common Era, before the Common Era), Before Current Era (Before the Current Era, before current era, before the current era), or before Christian Era.