Wednesday, December 14, 2011

Telephone directory

A telephone directory (also called a telephone book, phone book and white/yellow pages) is a listing of telephone subscribers in a geographical area or subscribers to services provided by the organization that publishes the directory. Its purpose is to allow the telephone number of a subscriber identified by name and address to be found.

Publication

Telephone directories can be published in hard copy or in electronic form. In the latter case, the directory can be provided as an online service through proprietary terminals or over the Internet, or on physical media such as CD-ROM. In many countries directories are both published in book for and also available over the Internet. Printed directories were usually supplied free of charge before online access was available; more recently there is often a charge,[citation needed] although subscribers are not obliged to buy a printed directory.
In France, the Minitel videotex system originated as an attempt by France Télécom to rid itself of its paper publishing costs by renting a Minitel terminal to all telephone users. However, France Télécom continues to give hard copies to its subscribers.
In Switzerland, most pay phones are now accompanied with electronic telephone directory terminals instead of paper directories,[citation needed] and phone users are charged for each search.

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