ASP or PHP ?

History:
Google.com:November 1998.Linux : C, Java, C++, PHP & MySQL
Facebook.com:February 2004.Linux: PHP, MySQL and C++
YouTube.com:February 2005.Linux: C, Java and MySQL
Yahoo.com:August 1995.Linux:C++, C, Java, PHP & MySQL
MSN.com:August 1995.Microsoft:Windows ASP.net
Live.com:August 2008:Microsoft Windows ASP.net
Wikipedia :January 2001.Linux: PHP & MySQL
Amazon.com October 1995.Linux & Solaris: C++, Java, J2EE
WordPress.com November 2005.Linux: PHP & MySQL