Facebook owns registrations in the US for:
FACEBOOK
It used to own one for THEFACEBOOK but amended it to FACEBOOK. It has applications for:
POKE
32665 (Facebook’s text message shortcode)
FBOOK
THE WALL
F (stylized)
FACEBOOK INSIGHTS
FANSUMER
FACEBOOK PAGES
FACEBOOK BEACON
FACEBOOK ADS
BEACON
SOCIALADS
SOCIAL ADS

From the AP:

The History Channel in the United States is now history.
Make that History. The cable network quietly dropped “the” and “channel” from its name recently, claiming History for itself. “Our brand is, in the media landscape, synonymous with the genre of history so I don’t think it’s presumptuous of us to call