No. 75: Abbott Laboratories, North Chicago, 2009 revenue of $30.76 billion

Automation and engineer scientist Tarak Shah, left, looks at the reports of the completed tests from the high throughput screening robot with Pat Humphrey, right, senior automation scientist at Abbott Laboratories in North Chicago. The robot is used to test compounds and any possible reactions they have that are similar to a human body's reaction. (Lane Christiansen/ Chicago Tribune)
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