The origins of common UI symbols

The origins of common UI symbols
You 'read' these without a second thought on a daily basis - the symbols for 'play', 'power', 'Bluetooth' and more. But what's the story behind these now-ubiquitous icons?

You 'read' these without a second thought on a daily basis - the symbols for 'play', 'power', 'Bluetooth' and more. But what's the story behind these now-ubiquitous icons?


(via Visual.ly)