Vintage Posters Highlight a Century of Innovation

It may be hard to believe as you read Wired on your iPad, but heating oil and metal plumbing pipes were hot tech topics just 100 years ago.
They were businesses, too, on which inventors pinned their hopes and corporations placed their bets in the form of factories, salesmen, and marketing budgets.
For a peek inside 100 [...]

Source: http://www.wired.com/gadgetlab/2011/02/vintage-posters/

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