What does ADT stand for in the context of monitored alarm systems?

In the context of monitored alarm systems, ADT stands for American Dictograph and Telephone. This terminology is historically linked to the company ADT, which began as the American District Telegraph Company and evolved into a prominent name in security systems and monitored alarm services. The company played a significant role in developing and providing technologies for intruder detection, fire alarms, and other security measures.

Understanding the roots of the name helps clarify the relevance of ADT to security systems, particularly in how it initially emphasized communications and monitoring services. The other options, while they could relate to technology in various ways, do not accurately reflect the historical context nor the significance of the acronym ADT in the domain of monitored alarm systems.