21.   An address book keeps track of mailing lists.

22.   Among its many tricks, it attempts to harvest e-mail addresses from several places including Windows address book files, Web pages, and files for chat programs.

23.   An address book lists the numbers of various police stations and fire stations.

24.   And as you address an outgoing e-mail message, green icons in your address book identify anyone who is online.

25.   And if your address book is currently on paper, entering it into electronic form may be an unproductive waste of time.

26.   And it will contain a new feature that lets the user store personal information at Netcenter, such as a personal address book and bookmarks for favorite sites.

27.   And increasingly, some carry viruses that have attached themselves to the address books of friends, with attachments which, if opened, could destroy my computer.

28.   And the homes usually are ransacked as the killer looks for address books or other documents that could implicate him or her, Lange added.

29.   And since the return address seems to be from someone who has you in his or her address book, the illusion is even more convincing.

30.   Another powerful feature of the site allows users to store their daily schedule information and their personal address book on PlanetAll.