To export your Address Book files to another Windows Address Book:
In Address Book, on the File menu, point to Export, and then click Address
Book (WAB).
Locate and select the Windows Address Book file you want to export to, and
then click Open.
For all other address book formats:
In the Address Book, on the File menu, point to Export, and then click Other
Address Book.
Click the address book or file type you want to export to, and then click
Export