A simple mechanical or electromechanical calculator that could only perform simple calculations such as addition or subtraction

(archaic) Early term for an aircraft; a machine for flying in (gerund); a machine that flies (participial adjective)

A device such as a slot machine designed to play solitary gambling games. / A slot machine for the purpose of playing video games.

plural of accounting machine

(accounting, computing, dated) A business machine, using keys or stored data, that tabulates, adds, subtracts, and totals.

plural of poker machine

plural of pokie machine

plural of poop machine

(informal, derogatory or humorous) An infant. / (idiomatic, derogatory or humorous) An animal whose defecation inconveniences humans.

plural of ticket machine