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411 is a telephone number for local directory assistance in Canada and the United States. Until the early 1980s, 411 – and the related 113 number – were free to call in most jurisdictions. In the United States, the service is commonly known as "information", [ 1 ] although its official name is "directory assistance".
411 NDA: National Directory Assistance. 411 is dialed and the operator is requested to search for a listing in an area code not local to the caller. For example: The caller lives in area code 630 (Oak Brook, Illinois) and requests a listing for a business in area code 213 (Los Angeles, California). In this case, AT&T Illinois bills the call.
Callers then identify the city and state for the desired information, and can then search either by name or by business type. Free directory assistance is also available from an application for the iPhone and Android mobile phones, [2] and from their website. The service, provided entirely by computer and with no human operators, uses a voice ...
A telephone directory, commonly called a telephone book, telephone address book, phonebook, or the white and 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 ...
GOOG-411 (or Google Voice Local Search) was a telephone service launched by Google in 2007, that provided a speech-recognition-based business directory search, and placed a call to the resulting number in the United States or Canada. [1] The service was accessible via a toll-free telephone number.
411 may refer to: The year AD 411, the four hundred and eleventh year of the Gregorian calendar; 411 BC; 4-1-1, a telephone directory assistance number in the United States and Canada By extension, a slang term for "information" 411.com, a Reverse telephone directory web property of Whitepages (company)
For instance, common words such as "the" might not be very helpful for revealing the essential characteristics of a text. So usually it is a good idea to eliminate stop words and punctuation marks before doing further analysis. 4. Computing term frequencies or tf-idf. After pre-processing the text data, we can then proceed to generate features.
An unpublished number is also excluded from directory assistance services, such as 411. Landline telephone companies often charge a monthly fee for this service. As cellular phones become more popular, there have been plans to release cell phone numbers into public 411 and reverse number directories via a separate Wireless telephone directory ...