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Option-click to Hide Apps Quickly

This trick has been available in the Mac OS for years, but many people still don't know it. If you have too many windows cluttering up your screen, you can hide specific ones easily as you work. When you're in any application, hold down the Option key and click on another app's window, on the Dock, or in the Finder to switch to that other app and simultaneously hide all the windows in the previously current app.

 
 

Alexander Graham Bell Speaks from Wax Recording

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When we think of old communications technology, many of us picture 10Base-2 coax connectors or maybe 2400 baud modems. But what about wax-covered cardboard discs? The Smithsonian discovered and digitized such a disc containing the voice of Alexander Graham Bell saying, "Hear my voice, Alexander Graham Bell." Now you can hear what the inventor of the telephone sounded like on 15 April 1885.favicon follow link