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A security alarm is a system designed to detect intrusions, such as unauthorized entry, into a building or other areas, such as a home or school. Security alarms protect against burglary (theft) or property damage, as well as against intruders. Examples include personal systems, neighborhood security alerts, car alarms, and prison alarms.
An improved "shear" electromagnetic lock was patented on May 2, 1989, by Arthur, Richard and David Geringer of Security Door Controls, an access control hardware manufacturing firm. The device outlined in their designs was the same in principle as the modern magnetic lock consisting of an electromagnet and an armature plate.
A fire alarm system is a building system designed to detect, alert occupants, and alert emergency forces of the presence of fire, smoke, carbon monoxide, or other fire-related emergencies. Fire alarm systems are required in most commercial buildings. They may include smoke detectors, heat detectors, and manual fire alarm activation devices ...
Signage is the design or use of signs and symbols to communicate a message. [1] [2] Signage also means signs collectively or being considered as a group. [3] The term signage is documented to have been popularized in 1975 to 1980. [2] Signs are any kind of visual graphics created to display information to
The Presidential Succession Act of 1947 (codified as 3 U.S.C. § 19) provides that if both the president and vice president have left office or are both otherwise unavailable to serve during their terms of office, the presidential line of succession follows the order of: speaker of the House, then, if necessary, the president pro tempore of the ...
Vivint Smart Home, Inc. an NRG company, is United States-based smart home and security provider delivering an integrated smart home system with in-home consultation, installation and support, and monitoring. Vivint offers a range of integrated smart home and security products, including cameras, locks, safety sensors, thermostats, lighting ...
The initial layer of security for a campus, building, office, or other physical space can use crime prevention through environmental design to deter threats. Some of the most common examples are also the most basic: warning signs or window stickers, fences , vehicle barriers, vehicle height-restrictors, restricted access points, security ...
Elon Reeve Musk (/ ˈ iː l ɒ n /; born June 28, 1971) is a businessman known for his key roles in the space company SpaceX and the automotive company Tesla, Inc. Other involvements include ownership of X Corp., the company that operates the social media platform X (formerly Twitter), and his role in the founding of the Boring Company, xAI, Neuralink, and OpenAI.
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