7 Gadgets That Changed the World
3. The PC
Once upon a time, computers were room-sized behemoths well outside the price range of the average Joe. Home computers were available in the 1970s, but the market only really took off in 1981 with IBM's PC, which cost less than $1,600.
Since then, PCs have of course become smaller and more powerful, and they have paved the way for laptops, netbooks, smartbooks, smartphones and other mobile computing. Oh, and they made the Internet possible. By 2007, 75 percent of U.S. households had a broadband connection, and more than 230 million PCs were in use nationwide.
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