A mechanic is a skilled tradesperson who works with machines and tools to repair, maintain, and build mechanical systems. A FITTER is a mechanic who specializes in the assembly and installation of machinery and equipment. A CRAFTSMAN is a person who is highly skilled in a particular craft or trade, such as carpentry or metalworking. A MACHINIST is a person who operates and maintains a machine or machines, such as a lathe or milling machine. A tooler is a mechanic who specializes in the use of tools to repair and maintain machines. An ARTISAN is a person who is highly skilled in a particular craft or trade, such as pottery or jewelry making. A greasemonkey is a slang term for a mechanic who specializes in the maintenance and repair of motor vehicles. A usedcarhealer is a slang term for a mechanic who specializes in the repair and maintenance of used cars.