Microsoft's decision to make instant messenger, now called Windows Messenger, an integral part of the Windows operating system highlights one application of the highly-buzzed software: business ...

While instant messaging is popular and pervasive in the corporate world, its growth has not been as robust as many expected it to be even just a few years ago.

Instant messaging is, for the most part, a less secure way to communicate than corporate e-mail, especially if one is using a public instant messaging system offered by a commercial provider.

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Instant messaging is still a great communications tool with immediacy and a modicum of intimacy. But no one has challenged AOL with a great application, and that is a shame.

What does instant messaging actually mean? Find out inside PCMag's comprehensive tech and computer-related encyclopedia.