Handheld Panic Button
a transmitting device for activating a panic alarm.

Heat Sensor
a device that detects heat or a rapid change in temperature which occurs in the presence of fire.

Home Automation
the use of devices to automatically regulate or perform functions commonly associated with the home.

Homeland Security
Security projects and technologies that monitor--

• borders, transportation, and seaports
• infrastructure such as communications systems and power grids
• chemical and biological threats
• needs of police, fire, and emergency medical personnel