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Buttons on a handheld calculator.

Generic arcade game buttons.

A button is a simple physical mechanism for controlling some aspect of a machine. Buttons are typically made out of hard material, usually plastic or metal. The surface is usually flat or shaped to accommodate the human finger or hand, so as to be easily depressed or pushed. When the button is pushed, an event (usually electrical in nature) takes place; for example, an electrical circuit might be completed. Wikipedia does not have an article with this exact name. ... In computing, a button (sometimes known as a command button or push button) is a widget that provides the user a simple way to trigger an event, like searching for a query at a search engine, or to interact with dialog boxes, like confirming his actions. ... Image File history File linksMetadata Download high-resolution version (2304x1712, 512 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Button (control) Metadata This file contains additional information, probably added from the digital camera or scanner used to... Image File history File linksMetadata Download high-resolution version (2304x1712, 512 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Button (control) Metadata This file contains additional information, probably added from the digital camera or scanner used to... A calculator is a device for performing calculations. ... Wikipedia does not yet have an article with this exact name. ... Wikipedia does not yet have an article with this exact name. ... Centipede by Atari is a typical example of a 1980s era arcade game. ... Antonym of psychical. ... Look up Control in Wiktionary, the free dictionary. ... Wind turbines A machine is any mechanical or organic device that transmits or modifies energy to perform or assist in the performance of tasks. ... Household items made out of plastic. ... Hot metal work from a blacksmith In chemistry, a metal (Greek: Metallon) is an element that readily forms positive ions (cations) and has metallic bonds. ... To push something is to move it by the application of force. ... Lightning strikes during a night-time thunderstorm. ... An electrical network is an interconnection of electrical elements such as resistors, inductors, capacitors, and switches. ...

Most aspects of button functionality are covered in the Switch article. Many buttons are biased switches which return to their original state immediately after being depressed. Electrical switches. ... Electrical switches. ... A state is a set of institutions that possess the authority to make the rules that govern the people in one or more societies, having internal and external sovereignty over a definite territory. ...

Also, buttons are not exclusively electrical in nature. Some buttons might ring a bell or cause other actions through purely physical means. For example, typewriter keys could reasonably be considered buttons. A bell is a simple sound-making device. ... Mechanical desktop typewriters, such as this Underwood Five, were long time standards of government agencies, newsrooms, and sales offices. ...

In popular culture, the phrase "the button" (somtimes capitalized) refers to a (usually fictional) button that a military or government leader could press to launch nuclear weapons. Popular culture, or pop culture, (literally: the culture of the people) consists of the cultural elements that prevail (at least numerically) in any given society, mainly using the more popular media, in that societys vernacular language and/or an established lingua franca. ... The mushroom cloud of the atomic bombing of Nagasaki, Japan, 1945, rose some 18 kilometers (11 mi) above the hypocenter. ...