machine

A machine is a mechanical or electrical device that applies force to perform tasks or operations, typically accomplishing work more efficiently than human effort alone. Machines range from simple devices like levers and pulleys to complex systems such as computers and industrial robots. The fundamental principle behind machines is mechanical advantage, which allows users to multiply force or change the direction of applied force.

Simple machines include levers, wheels and axles, pulleys, inclined planes, wedges, and screws. These basic mechanisms form the building blocks of more complex machines. Compound machines combine multiple simple machines to perform more sophisticated functions.

Throughout history, machines have revolutionized human society, from the Industrial Revolution's steam engines to today's artificial intelligence systems. They have increased productivity, enabled mass production, and transformed transportation, communication, and countless other aspects of daily life. Modern machines increasingly incorporate digital technology, automation, and artificial intelligence, continuing to reshape how humans work and live.