-ASM since ~92 (680x0,dsp,jaguar,avr,..anything goes, just give me a sec. =)
-Math & physics ..both in theory and computer simulations (FEM,matlab,pde,..)
-Electronics (digital&analog).
-Signal analysis (statistical, NN based, or..? think i tried all methods known to man).
--specific list is to long so if you think I might know, dont hesitate to ask! =) cheers