The success of portable computing this decade is due at least in part to the pioneering work of many companies in decades past.
Apple recently launched the iPad 2 to tremendous fanfare, and the device is being hailed as the latest and greatest portable computing device. Even though more powerful convertible tablet PCs were available years ago, the iPad has flourished thanks to its intuitive touch-based interface and a wealth of easy-to-install third-party applications. Apple sold around 15 million iPads in 2010, and the company looks poised to have a big year with the iPad 2.
Important milestones in portable computing include devices such as single-chip calculators, "laptops" that weighed nearly 24 pounds, digital organizers, and even a few older Apple inventions. Here's a look at 18 of the most notable mobile computers.
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