Bitcoin, based both on common and new technologies, is a perfect extension to traditional currency.

FORBES: First Bitcoin Hedge Fund Launches From Malta

Microsoft feels this partnership with Sesame Workshop and National Geographic was a perfect extension to appeal to those nongamers.

CNN: Kinect helps TV shows talk to your kid

For total flexibility, all models come with multiple sizes of comfortable ear tips, extension cables and ear clips to ensure perfect fit for every listener.

ENGADGET: Denon outs 2009 line of Blu-ray players, AV receivers and headphones

The perfect shotgun, any bird hunter or clay shooter will tell you, should feel like an extension of your own arms.

FORBES: Smart Collecting