Microblogging allows employees to send direct and broadcast messages to each other, similar in concept to Twitter but within the company.

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Posters of candidates fill the streets of Baghdad and other major cities these days, and candidates are taking advantage of the print and broadcast media to send out their messages.

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The viewing figures for some games have been so low that it would have been cheaper to send the audiences to the game than to broadcast them.

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When Katie Couric took over the "CBS Evening News" in 2006, she at first began each broadcast with "Hi, everyone, " to send a signal of friendliness and non-pontification.

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Suddenly people could do something that had previously been impossible: you could broadcast your public key to the world, allowing anyone to send you messages that only you could read.

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