An Amber alert or a child abduction emergency alert is a message distributed by a child abduction alert system to ask the public for help in finding abducted children. The system originated in the United States of America.
Amber Hagerman in December 1995, shortly before her abduction and murder in January 1996
An Amber alert as seen on Android, advising users to call 911 if they find a car with a matching description.
An example of a July 2010 Amber Alert from Milwaukee, Wisconsin, where electronic LED billboards, such as this one in Sheboygan, Wisconsin owned by Lamar, are used to relay details of the incident to the public.
AMBER Alert displayed on cable TV by the Emergency Alert System. Generated via a DASDEC or a One-Net EAS/IPAWS encoder used by a NJ cable system.
Specific Area Message Encoding
Specific Area Message Encoding (SAME) is a protocol used for framing and classification of broadcasting emergency warning messages. It was developed by the United States National Weather Service for use on its NOAA Weather Radio (NWR) network, and was later adopted by the Federal Communications Commission for the Emergency Alert System, then subsequently by Environment Canada for use on its Weatheradio Canada service. It is also used to set off receivers in Mexico City and surrounding areas as part of the Mexican Seismic Alert System (SASMEX).
An example of a SAME alert weather radio receiver.