OPOSSUMS ARE MARSUPIALS. If you open just about any field guide to North American mammals, the opossum will probably be the very first of the 380 or so mammal species described. That's because opossums are our only marsupial, and marsupials are considered very ancient forms of mammals.
operator - an agent that operates some apparatus or machine; the operator of the switchboard. manipulator. causal agency, causal agent, cause - any entity that produces an effect or is responsible for events or results. company operator - an operator who works for a company. driver - the operator of a motor vehicle.
what do machine operators do? Machine operators, also knows as machinists or tool and die makers, work with heavy machinery from setup to operation. Machine operators might work with computer-controlled equipment or more mechanically based machines to make sure they are set up properly, working well, and producing quality product.