During his demonstration, Gates showed how people who book flights using the Expedia online travel service will automatically receive updated flight and weather information cellular phones enabled with wireless applications protocol.

CNN: Gates aims for wireless blue yonder

Amazon started as an online book seller before diversifying to be the multi-service provider it currently is.

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Plaxo was Parker's first attempt at creating a real company--an online service that aimed to keep your address book up to date.

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