O is the fifteenth letter of the modern Latin alphabet. Its name in English is spelled o (pronounced /o?/), plural oes. ...
http://en.wikipedia.org/wiki/O

Oxygen is the element with atomic number 8 and represented by the symbol O. It is a member of the chalcogen group on the periodic table, and is a highly reactive nonmetallic period ...
http://en.wikipedia.org/wiki/Oxygen

O'Charley's casual-dining restaurants serve good American food. Ocharley's family friendly menu features speciality items such as aged beef steaks, fresh seafood and chicken ...
http://www.ocharleys.com/

A full-access, online version of the occupational network database.
http://online.onetcenter.org/

Enables users to search the Web, Usenet, and images. Features include PageRank, caching and translation of results, and an option to find similar pages. The company's focus is ...
http://www.google.com/