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16. Rockwell Automation
Rockwell Automation
Fortune 500 rank: 429

The Milwaukee maker of industrial automation systems saw the biggest drop on the Top 20 tech list, with profits declining 61.2% to $577.6 million on sales of $5.7 billion.

That was largely due to the 2007 sale of its Power Systems group, which resulted in a one-time boost to profits.

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Last updated April 29 2009: 1:31 PM ET
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