What Does ADT Stand For?



A
Ada
Author has 61 answers
District Telegraph in the United States It all began with a nocturnal break-in on April 5, 1874. Edward Callahan, the founder of American District Telegraph (ADT), invented a telegraph-based "call-box" to communicate for help to a central office. He immediately joined 50 more homes in the area, establishing the first domestic security system network.
82.2k views Report

{{item.question}}

{{item.username.toUpperCase().substr(0,1)}}
{{item.username}}
Author has {{item.statsAnswers}} answers
{{item.views}}k views Report
Related questions
Contact Us
×