MONO (Machine Operation Navigation of Outer space) is a term used to describe vessels that are capable of space travel. Different from terrestrial planes and cars, MONO Machines contain navigation systems, airframe control mechanics, and auto-calculation software The most common types of MONO Machines are MONO Racers, MONO Boats and MONO Carriers which refer to the technical aspects and primary function of the spacecraft. It is unknown how MONO Machines differ from Zipcrafts, although they may be used interchangeably in some social circles.