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From CNN.com - Technology:
It's been described as the solution to a problem nobody realized existed.
But that hasn't stopped the humble Post-it Note from becoming a ubiquitous fixture of stationery cupboards worldwide, with manufacturers 3M producing 50 billion each year.
The sticky yellow squares did not always look destined to set the office supply world alight. In fact, it took 12 years from when the technology behind the product was first developed, to Post-its hitting the market.
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