Every so often, a device comes along that changes the way we live our daily lives and things are never the same again. With today's digital technology, such devices may come more frequently than in the past, but our list revolutionary gadgets extends back two centuries.
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The battery is the sine qua non for most of the other gadgets on our list. We love gadgets that are small and portable, and they wouldn't be possible without a small, portable source of power. Alessandro Volta managed to put together a voltaic pile -- literally, a pile of metal disks separated by wet cloth -- as early as 1800, but it wasn't until 1881 that the dry battery came along, making it possible to carry a source of electricity around in your pocket.
Google in the Enterprise SurveyThere's no doubt Google has made headway into businesses: Just 28 percent discourage or ban use of its productivity products, and 69 percent cite Google Apps' good or excellent mobility. But progress could still stall: 59 percent of nonusers distrust the security of Google's cloud. Its data privacy is an open question, and 37 percent worry about integration.