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2. 911 (emergency telephone number) - Wikipedia

   en.wikipedia.org/wiki/911_(emergency_telephone...

   The first use of a national emergency telephone number began in the United Kingdom in 1937 using the number 999, which continues to this day. [6] In the United States, the first 911 service was established by the Alabama Telephone Company and the first call was made in Haleyville, Alabama, in 1968 by Alabama Speaker of the House Rankin Fite and answered by U.S. Representative Tom Bevill.

3. SMS gateway - Wikipedia

   en.wikipedia.org/wiki/SMS_gateway

   A direct-to-mobile gateway is a device that has built-in wireless GSM connectivity. It allows SMS text messages to be sent and/or received by email, from Web pages or from other software applications by acquiring a unique identifier from the mobile phone's Subscriber Identity Module, or "SIM card".

4. Toll-free telephone number - Wikipedia

   en.wikipedia.org/wiki/Toll-free_telephone_number

   A toll-free telephone number or freephone number is a ... various providers offer gateways which receive free phone calls on PRI ... Text is available under the ...

5. Cell Broadcast - Wikipedia

   en.wikipedia.org/wiki/Cell_Broadcast

   Cell Broadcast messaging was first demonstrated in Paris in 1997. Some mobile operators used Cell Broadcast for communicating the area code of the antenna cell to the mobile user (via channel 050), [4] for nationwide or citywide alerting, weather reports, mass messaging, location-based news, etc. Cell broadcast has been widely deployed since 2008 by major Asian, US, Canadian, South American ...

6. Number needed to treat - Wikipedia

   en.wikipedia.org/wiki/Number_needed_to_treat

   The number needed to treat (NNT) or number needed to treat for an additional beneficial outcome (NNTB) is an epidemiological measure used in communicating the effectiveness of a health-care intervention, typically a treatment with medication. The NNT is the average number of patients who need to be treated to prevent one additional bad outcome ...

7. Short code - Wikipedia

   en.wikipedia.org/wiki/Short_code

   Short codes, or short numbers, are short digit-sequences—significantly shorter than telephone numbers—that are used to address messages in the Multimedia Messaging System (MMS) and short message service (SMS) systems of mobile network operators. [1]