Proprietary Health IT Systems:

• Google Health: www.google.com/health
  
• IMB Healthcare: http://www-03.ibm.com/industries/healthcare/us/list/solution/all/index.html
  
• Microsoft Health: www.healthvault.com
• Epic Systems: http://www.epicsystems.com/
  
• Cerner Corporation: http://www.cerner.com/public/
  
• Siemens Healthcare: https://www.smed.com/default.asp