(1) In electrical engineering, a manual switch with two or more positions for closing and opening electrical control circuits. They are usually mounted on control boards and panels and are used in automatic and remote-control systems.
Control switches are classified according to their functions: switches that form command or signalling control circuits (command control switches), switches that acknowledge or correct incoming signals (acknowledging control switches), and switches that combine these functions. Frequently a signal lamp is built into a control switch to indicate its position.
(2) In analog computers a control switch is an. electronic switching unit that controls the operation of the integrating (operational) amplifiers.