Originally Posted by BIGTYMER

GD - General Dynamics
NOC - Northrop Grumman
HII - Huntington Ingalls (Just a few months ago NOC split up there ship building into HII. Made me a ton of money. If I recall correctly it was a 2:1 stock split.)
RTN - Raytheon
LMT - Lockheed Martin
TDY - Teledyne Technologies

Heavy hitters. In no real order.