||This article has an unclear citation style. (May 2010)| In
engineering, electromechanics combines electrical and mechanical
processes and procedures drawn from electrical engineering and
mechanical engineering. Electrical engineering in this context
also encompasses electronics engineering. Devices which carry
out electrical operations by using moving parts are known as
electromechanical. Strictly speaking, a manually operated switch
is an electromechanical component, but the term is usually
understood to refer to devices such as relays, which allow a
voltage or current to control other, isolated voltages and
currents by mechanically switching sets of contacts, solenoids,
by which a voltage can actuate a moving linkage, vibrators,
which convert DC to AC with vibrating sets of contacts, etc.
Before the development of modern electronics, electromechanical
devices were widely used in complicated systems subsystems,
including electric typewriters, teletypes, very early television
systems, and the very early ele