Is "People" and Application? How does it interact with Outlook and\or Google?

I am a new Android user....it has been about a month since I moved from the Blackberry and really like the change. I use Outlook with an Exchange Server and want to understand how my contacts are integrated.

I have spent some time going through my contacts and linking Outlook, Facebook, Twitter, and Google profiles which is very cool for a type A person like me, I have more to do and will continue to do so. What I would like to know is how I backup or replicate this information.

The ultimate for me would be to have the ability for these links to be replicated in Outlook but that doesn't seem possible? Is there a "People" for PC ap or how do I insure that the work I go through to link the accounts is preserved?