Aerospace
2011 sales: $11.5 billion

This unit is one of the world's largest makers of engines for business jets and advanced avionics for aircraft like the Boeing 787 Dreamliner (above).


By Shawn Tully, senior editor-at-large @FortuneMagazine - Last updated May 14 2012: 5:51 AM ET
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Exxon Mobil knocks Wal-Mart from the top spot. Who else made the top 50 this year?

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