Computer Laptop Security Alarm

Intruder Alarm Systems Intruder Alarm Systems go off when someone has triggered an alarm, usually by breaking a circuit. The most common alarm system, found in houses and businesses, involves placing an electronic circuit that goes across openings like doors and...

SPARK or SABOTAGE?

There have been a number of explosions and fires in chemical and petroleum refineries lately. Just yesterday there was a serious fire at an Exxon Mobile Refinery in Texas, and in June there was a big refinery fire in Philadelphia which destroyed key equipment.   Are...