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2. Driveway alarm - Wikipedia

   en.wikipedia.org/wiki/Driveway_alarm

   A driveway alarm is a device that is designed to detect people or vehicles entering a property via the driveway.A driveway alarm system is often integrated as a component of a system which automatically performs a task or alerts home owners of an unexpected intruder or visitor.

3. Security alarm - Wikipedia

   en.wikipedia.org/wiki/Security_alarm

   Driveway alarm systems can be combined with most security and automation systems. They are designed to alert residents to unexpected visitors, intruders, or deliveries arriving at the property. Types of driveway sensors include magnetic and infrared motion sensors. Driveway alarms can be found in both hard-wired and wireless systems.

4. Induction loop - Wikipedia

   en.wikipedia.org/wiki/Induction_loop

   The transmission is normally direct rather than superimposed or modulated upon a carrier, though multi-channel systems have been implemented using modulation. Many hearing aids contain a telecoil which allows the user to receive and hear the magnetic field and remove the normal audio signal provided from the hearing aid microphone site. [5]

5. Motion detector - Wikipedia

   en.wikipedia.org/wiki/Motion_detector

   A motion detector attached to an outdoor, automatic light. A motion detector is an electrical device that utilizes a sensor to detect nearby motion (motion detection).Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area.

6. Home security - Wikipedia

   en.wikipedia.org/wiki/Home_security

   The control panel is the main connection to the alarm company monitoring a home. It typically features a touchpad or buttons to easily maneuver the system, and some newer systems also feature voice control or wireless remotes (key fobs).

7. Automatic Warning System - Wikipedia

   en.wikipedia.org/wiki/Automatic_Warning_System

   AWS is a system based on trains detecting magnetic fields. These magnetic fields are created by permanent magnets and electromagnets installed on the track. The polarity and sequence of magnetic fields detected by a train determine the type of indication given to the train driver. A magnet, known as an AWS magnet is installed on the track ...

8. AOL Calendar - You're almost there, but your web browser ...

   calendar.aol.com

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9. Electromagnetic door holder - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_door_holder

   Wall-mounted electromagnetic door holder securing a door in the open position. An electromagnetic door holder (electromagnetic door holder and release or hold-open device, sometimes informally called a mag hold open or electric doorstop) is a simple electromechanical mechanism which can be used to hold a fire door or security door open until given a signal to release.