payload (n.)youdaoicibaDictYouDict[payload 词源字典]
also pay-load, 1917, from pay + load (n.). Originally the part of a truck's (later an aircraft's) load from which revenue is derived (passengers, cargo, mail); figurative sense of "bombs, etc. carried by a plane or missile" is from 1936.[payload etymology, payload origin, 英语词源]