In the same spirit of standardization that inspired Apple to create Safari, Mac OS X includes the Address Book program built-in. As PIMs (Personal Information Managers) go, Address Book is hardly the most advanced. Still, Address Book works wonderfully with Mail, synchronizes with other Macs (if you've paid for the $99-a-year .Mac service, and, of course, Address Book is free.
What makes Address Book the darling of power users, however, is its AppleScript support. By sending simple commands to Address Book, you can: