Power key

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The power key, or power button, is a key found on many computer keyboards during the 1980s and into the early 2000s. They were introduced on the first Apple Desktop Bus keyboards in the 1980s and have been a standard feature of many Macintosh keyboards since then. They are also found on an increasing number of Microsoft Windows keyboards,^{[citation needed]} sometimes supplanted with additional keys for sleep. The power key is becoming increasingly rare.^{[citation needed]}