Machines have been writing with pens for longer than I've been alive - since 1958 according to https://en.wikipedia.org/wiki/Plotter#History.

For that matters, pens are a type of machine. if you use a pen you are a machine operator.

▲ 1718627440 6 days ago | parent [-]

A pen is a tool not a machine, or does your pen have a motor?

▲ bluGill 5 days ago | parent [-]

What is the difference between tool and machine?

▲ 1718627440 5 days ago | parent [-]

Whether there is a drive unit.

    tool + drive = machine
    machine + sensor = automaton
    automaton + decision = robot

	▲	IT4MD 5 days ago \| parent [-]
		Stealing this.. thanks!