What are the top 10 high technology companies in the United States?

High technology is vague, but I am talking about companies who are innovative and whose products will be needed in the foreseeable future. An example would the a particular company who is on the cutting edge of nano-technology.

1) Yahoo
2)Google
3)Choice point
4)Acxiom
5)Microsoft
6)Amazon.com
7)Accenture
8)America online
9)LexisNexis
10)Response unlimited