Mathematics plays a - an integral part [of electronic warfare]. When you're dealing with fixing the circuits, if something burns out or one of our transformers or something like that breaks. Ohm's law is a good one. You have to use that to be able to fix all of your electronic circuits. Binary numbers is a good one. That's the way computers talk, in ones and zeros. The way that works is your computer is turned on and ones and zeros, on and off, on and off, on and off. It's like a Morse code that computers use. So you have to understand when that computer or that piece of gear, that equipment gives you this code, you have to take that, translate it into regular numbers, decimals, and figure out what the problem is.