This means that the more subscribers a user is connected with, the larger his playlist.

FORBES: Morning Tech Wrap: Steve Jobs, Samsung, Facebook

From there, Huen mapped various songs onto different positions of the knob, allowing him to control his playlist by moving it -- a simple, manual interface for selecting music.

ENGADGET

That shouldn't be a problem for Ryan as long as a staffer doesn't confuse his personal playlist with the campaign rally mix.

CNN: Ryan Rages Against the Machine

Paul made his way to his computer to put on a Tears for Fears B Sides playlist.

FORBES: Wine, Cheese, Couchsurfing, and Nudity

Glasper set his iPod on the piano, and as the trio played, he fired a playlist of three important speeches.

NPR: Robert Glasper: The Inauguration Session