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Bonsack's machine
James Albert Bonsack's cigarette rolling machine, invented in 1880 and patented in 1881.

A machine is a tool containing one or more parts that uses energy to perform an intended action. Machines are usually powered by mechanical, chemical, thermal, or electrical means, and are often motorized. Historically, a power tool also required moving parts to classify as a machine. However, the advent of electronics has led to the development of power tools without moving parts that are considered machines.<ref name=AHD/>

A simple machine is a device that simply transforms the direction or magnitude of a force, but a large number of more complex machines exist. Examples include vehicles, electronic systems, molecular machines, computers, television, and radio.


Machine sections
Intro  Etymology  History   Types    Machine elements   Impact   See also   References  Further reading  

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