Cosmic microwave background radiation

Cash Money Brothas, a now defunct Chicago street gang

Bandaranaike International Airport (IATA airport code)

China Motor Bus, formerly a franchised bus services provider of Hong Kong

Core-mantle boundary

Combat Medical Badge

China Merchants Bank

C.M.B., Color Me Badd's debut album

Compagnie Maritime Belge

UCD Center for Mind and Brain, a cognitive neuroscience research center at the University of California, Davis