The 25 Biggest Tech Companies On The Fortune 500


17. Emerson Electric

Fortune 500 Rank: No. 123

Revenue: $24.5 billion

Top Executive: CEO David Farr

St. Louis-based Emerson Electric dropped slightly from its No. 120 ranking in 2012. The company includes the Huntsville, Ala.-based Emerson Network Power and its networking, power management and peripherals products.