Activity Monitor use

My activity monitor is showing the following two items, AddressBookSourceSync and CalendarAgent, using 75% to 85% of my resources. What are these and what are they doing? There is a third call Mingle that is also using a large amount of resources. Is all of this normal?

Kappy,
I found what you see in the attached screen shot. As you will se I do not have what you suggested. Also, so I understand more fully what did you back up and where did you save it?

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