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address book[′ad·rəs ‚bu̇k]
A feature in an e-mail program for storing e-mail addresses.
address book(1) A file of email addresses that is maintained in an email program. See Web white pages.
(2) A file of names, addresses and phone numbers maintained in a personal information manager (PIM), contact manager, mobile phone or other application that deals with groups of individuals or companies in some manner.