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2. Switch - Wikipedia

   en.wikipedia.org/wiki/Switch

   Each key of a computer keyboard, for example, is a normally-open "push-to-make" switch. A "push-to-break" (or normally-closed or NC) switch, on the other hand, breaks contact when the button is pressed and makes contact when it is released. An example of a push-to-break switch is a button used to release a door held closed by an electromagnet.

3. Push-button - Wikipedia

   en.wikipedia.org/wiki/Push-button

   A push-button (also spelled pushbutton) or simply button is a simple switch mechanism to control some aspect of a machine or a process. Buttons are typically made out of hard material, usually plastic or metal. [1] The surface is usually flat or shaped to accommodate the human finger or hand, so as to be easily depressed or pushed.

4. List of video connectors - Wikipedia

   en.wikipedia.org/wiki/List_of_video_connectors

   Male Mini-DVI plug on top of a 12-inch PowerBook G4; female port is second from left. Mini-DVI: VGA, DVI, television. Apple Computer alternative to Mini-VGA. Often now replaced by Mini DisplayPort. Female Micro-DVI port (rightmost) on MacBook Air: Micro-DVI: DVI-D dual link Replaced with Mini DisplayPort. DMS-59

5. Pogo pin - Wikipedia

   en.wikipedia.org/wiki/Pogo_pin

   Variety of loose pogo pins and pogo pins in 3-pin assembly holders and with Pick and Place caps Sectional drawing of a pogo pin, showing the plunger, barrel, and spring. A pogo pin or spring-loaded pin is a type of electrical connector mechanism that is used in many modern electronic applications and in the electronics testing industry. [1]

6. Mini-DIN connector - Wikipedia

   en.wikipedia.org/wiki/Mini-DIN_connector

   Mini-DIN-3 connectors were used in early implementations of Apple LocalTalk. Mini-DIN-4 connectors are used for S-video, and were used for Apple Desktop Bus. Mini-DIN-6 connectors were used for IBM PC compatible PS/2 keyboard and mouse ports and for Acorn Archimedes keyboards (prior to the A7000, these were proprietary, while A7000 and later ...

7. DIN connector - Wikipedia

   en.wikipedia.org/wiki/DIN_connector

   Five-pin male 180° DIN connector from a 1988 Schneider MF2 keyboard by Cherry. The DIN connector is an electrical connector that was standardized by the Deutsches Institut für Normung (DIN), the German Institute for Standards, in the mid 1950s, initially with 3 pins for mono, but when stereo connections and gear appeared in late 1950s (1959 or so), versions with 5 pins or more were launched.