manipulator, hustler, wheeler dealer, owner, operation, operating, despatcher, dispatcher, worker, manager, more...

passenger, bystander, spectator, observer, nonparticipant

unary, binary, ternary, quaternary, quinary, sexary, septenary, octonary, nonary, more...

human, wireless, linear, experienced, single, skilled, differential, logical, local, unary, relational

order taker,   user of a tool