By contrast, Jobs said, BlackBerry users rely on servers run by Research In Motion to shuttle information between corporate servers and BlackBerry users.

FORBES: IPhone Goes Corporate

By contrast, Jobs said, BlackBerry users rely on servers run by Research In Motion (nasdaq: RIMM - news - people ) to shuttle information between corporate servers and BlackBerry users.

FORBES: IPhone Goes Corporate

Unlike Napster, Gnutella is distributed for free by a loosely organized community of users, and it does not rely on any central computer.

FORBES: Gnutella Could Make Moviemakers Cry

"We expect Google to build share quickly by attracting many of the 28% of Internet users that do not rely on Microsoft's Internet Explorer, " Marianne Wolk, an analyst with Susquehanna Financial Group, wrote in a note to investors Wednesday.

FORBES: The Web's Edge

For example, categories like fast food or beer rely less on strong affiliation among their users but can still tap into social currency by helping others to learn from each other (beer) or by strengthening the identification level with other patrons (fast food).

FORBES: How Strong Is Your Brand In The Social Context? Here's How To Find Out