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2. 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.

3. 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.

4. Button cell - Wikipedia

   en.wikipedia.org/wiki/Button_cell

   A button cell, watch battery, or coin battery is a small battery made of a single electrochemical cell and shaped as a squat cylinder typically 5 to 25 mm (0.197 to 0.984 in) in diameter and 1 to 6 mm (0.039 to 0.236 in) high – resembling a button.

5. Flashlight - Wikipedia

   en.wikipedia.org/wiki/Flashlight

   Miniature LED flashlight on a key chain, powered by lithium primary coin batteries. Light output from LED flashlights varies even more widely than for incandescent lights. "Keychain" type lamps operating on button batteries, or lights using a single 5 mm LED, may only produce a few lumens. Even a small LED flashlight operating on an AA cell ...

6. You can get deals starting at $4 in Amazon's secret ... - AOL

   www.aol.com/lifestyle/you-can-get-deals-starting...

   The lid design is top-notch: press a button and the clear top piece springs back to reveal a sip or straw option. Snap open the protruding piece below the button and the entire lid lifts back for ...

7. Pointing stick - Wikipedia

   en.wikipedia.org/wiki/Pointing_stick

   A pointing stick on a mid-1990s-era Toshiba laptop. The two buttons below the keyboard act as a computer mouse: the top button is used for left-clicking while the bottom button is used for right-clicking. Optical pointing sticks are also used on some Ultrabook tablet hybrids, such as the Sony Duo 11, ThinkPad Tablet and Samsung Ativ Q.