WHAT'S INSIDE: SOCIAL NETWORKING

Most of us know that Internet communities and social networking sites are popular, but how do blogs, podcasts, wikis and companies like Digg and MySpace work? Learn more in the Social Networking section.
FEATURED: SOCIAL NETWORKING
FPO

If you're really popular on Twitter -- and of course you are -- you may have trouble managing all your followers effectively. Which Twitter add-ons can help you out?

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How StumbleUpon Works

Have you ever stumbled upon a cool Web site and shared it with your friends? StumbleUpon.com is an online social network that allows you to do just that with millions of users.

How Zwinky Works

Imagine walking around Zwinktopia's Zwinchester mall with your Zcard in-hand -- loaded with Zbucks. If you don't recognize any of these terms, then you must not be one of Zwinky's more than 16 million users.

INTERNET: SOCIAL NETWORKING