Top five (computer) technology companies

No I did not create the list based on where they stand now or what their market cap is. The list is based on what their historic contributions have been. Feel free to challange the list:

Xerox PARC - The hidden revolutionary

IBM - If you want to win, they need to be behind it

Cisco - The internet transformer

Apple - Getting younger by the day

Sun Microsystems - A Swashbuckler but you need them

Don't be surprised not to see Microsoft or Netscape or Google in there.