Subscribe with iTunes | Review on iTunes If you have multiple entries for a person or company in your address book, which may contain partial info, you can merge them into one single card. I would recommend backing up your Address Book before you try this tip - just in case you don't like the results. To do so, go to File -> Backup Address Book. Here is how to do it: Open 'Address Book' I have two cards - but each one contains partial info. Hold down Command and click the cards you want to merge. Go to the 'Card' menu and choose 'Merge Selected Cards' Now I have only ONE address card, and the info from both of them are merged into it. (notice the fictitious 'Cupertono' - it's south of 'Cupertino' ;-).