When did ALL-CAPS type become YELLING?

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You've seen them before, whether in a forwarded spam email, a strangely passionate Facebook post or a weirdly emphatic comment on your favorite website: THE DREADED ALL-CAPS TYPER. But where does this practice come from? How did everyone agree that typing in ALL CAPS means you're yelling at someone via text? Tune in to... FIND OUT.

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#funny
#usage
#new media
#newspaper
#ridiculous
#terminal
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#howstuffworks
#ben bowlin
#noel brown
#old media
#all caps
#history
#shouting
#ridiculous history
#strange
#language