EMP = Electro-Magnetic Pulse:
"electromagnetic radiation from an explosion (especially a nuclear explosion) or an intensely fluctuating magnetic field caused by Compton-recoil electrons and photoelectrons from photons scattered in the materials of the electronic or explosive device or in a surrounding medium. The resulting electric and magnetic fields may couple with electrical/electronic systems to produce damaging current and voltage surges."
M.O.D. = UK...Ministry Of Defense. I think, anyway; someone correct me if I'm wrong.
J.A.N = US...Joint Army/Navy
I don't care where they come from or what they're in. I think it's cool to fire them up and see 'em all glowing orange and hearing groovy sounds come from them.