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Parallel Resistors

Parallel Resistors enables you to calculate the resistor you can add in parallel to an existing one to achieve your ideal target value. Results can...

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Split This Bill

Split This Bill is the easiest way to evenly split a bill between a number of people. It automatically calculates the tip based on a percentage of...


Experts take down Grum spam botnet, world's third largest

Botnet was responsible for 18 billion spam messages a day -- about 18 percent of the world's spam -- experts tell The New York Times.

By July 18, 2012


Botnets cause surge in February spam

Spam levels increase more than 5 percent in February over prior month, due in large part to greater activity from Grum and Rustock botnets, according to Symantec.

By March 2, 2010