Each input has 2 corresponding outputs that it can connect to. Most manufacturers use the abbreviations dpst and dpdt to indicate switch types.

Multiway Switching Wikipedia
What is a double pole switch used for. Each of the terminals of a double pole double switch can either be in 1 of 2 positions. With 2 inputs it can connect to 4 different outputs or reroute a circuit into 4 different modes of operation. A double pole switch is also used to control two lights or a light and a fan on separate circuits. Video of the day volume 0. Each of the terminals of a double pole double switch can either be in 1 of 2 positions. Like the single pole switch a double pole switch has onoff markings and controls a device or equipment from one location.
Single pole switch is referred as a single pole single throw switch. A double pole switch controls two separate circuits. This makes the the double pole double switch a very versatile switch. A double pole switch is like two separate single pole switches that are mechanically operated by the same lever knob or button. Its also because the wires feeding electricity to the switch are larger and this is due to the fact that double pole switches are usually used to control 240 volt circuits. This makes the the double pole double throw switch a very versatile switch.
A double pole single throw switch dpst turns two circuits on or off. Each input has 2 corresponding outputs that it can connect to. The double pole switch is commonly used in industrial applications but can be found in some home wiring systems. A double pole switch can be used to control light and a fan or 2 lights on separate circuits. A double pole double throw switch dpdt manages two circuits and turns both on and off together. It is easy to wire a double pole switch to work as a single pole switch because only one side is used instead of both.
A double pole double throw dpdt switch is a switch that has 2 inputs and 4 outputs. A single pole switch controls just one circuit. A double pole switch is usually a bit larger than a single pole one but that isnt just because it has to accommodate two poles instead of one. A switch pole refers to the number of separate circuits that the switch controls. Wiring a double pole switch to work as a single pole switch is easy as only one side is used rather than both. With 2 inputs it can connect to 4 different outputs.
A double pole switch has two connectors poles that can control two circuits. A double pole double throw dpdt switch is a switch that has 2 inputs and 4 outputs.