Basque eu, eus berkelium Bk beryllium Be bismuth Bi bit b bohrium Bh boron B bromine Br Bulgarian bg, bul byte B cadmium Cd caesium Cs calcium Ca californium Cf carbon C Catalan ca, cat Catalan sign language csc Central Intelligence Agency CIA central processing unit CPU cerium Ce cesium Cs Chinese zh, zho Chinese (Mandarin) cmn chlorine Cl chromium Cr