That is your call log.
From your phone icon, where you see the list of recent calls, you can click on the trackwheel which will bring up a menu of call from address book, call from ....., pick address book and then find the person you want to call.
I find it easier to just go to the address book first and then when you click on a person, it will ask if you want to call, email, sms, etc that person. The options will vary based on the person and what contact info you have on that person.
Hope that helps,