April Issue 2009


For electrical contractors, the most interesting aspect of the American Recovery and Reinvestment Act...

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| April 2009
Internet protocol (IP) is increasingly described as a revolutionary force.

| April 2009
Air-duct smoke detectors are not the same as open-area room detectors. Area detectors’ main function is to sense smoke as a sign of fire.

| April 2009
When I was in college many years ago, my psychology professor said, “Every year, we give the same tests, but each year, the correct answers change.” We never knew if he was j

| April 2009
When stock market investments and property shrink in value, it is tempting to convert them into safer vehicles, such as bank deposits.