A lifting machine is a device used to lift heavy loads. It is commonly known as a crane, hoist or elevator. Other synonyms for a lifting machine include a pulley system, winch, jack, forklift, and conveyor. Pulley systems are simple machines that can be used to lift heavy objects by using a rope or cable. A winch is another type of lifting machine that is used to lift and pull heavy loads. Jacks are smaller lifting machines that are used to raise objects off the ground. Finally, forklifts and conveyors are mechanical lifting machines that are commonly used in warehouses and factories to transport heavy loads from one place to another.