Hi, I'm Wendell Oskay and I'm Lynn Arrenman and we're here in the loading dock at Evil Med Scientists Laboratories to show you our creation the giant Digicom 2. So this is a recreation of the famous 1960s education computer kit the Digicom 2. The original one from 1965 or so used half-inch marbles and they went through flip-flops and switches as gates. I was a genuine binary mechanical computer. This is a fairly faithful reproduction of that sheet except at much larger scale rather than the half-inch marbles using these eight balls. So this machine can count how many balls we have up there and can add, subtract, multiply, divide, clear the register, calculate the two's complement and it's a genuine functioning automatic binary mechanical computer. And so let's do a calculation we're going to do. So we're going to set up a multiplication problem. Let's do three times 13. Three times 13. Okay, so we're going to set three in our multiple-wire register here. One in the one's place and one in the two's place. So that's three in binary here and then we want 13 in the memory register. So we'll put one in the eighths place, one in the fours place and one in the what's place. So eight plus four plus one's 13 binary and then over here this is our seven-bit accumulator register. Right now it's got a zero in it but after our calculation is complete we should have three times 13 show up in that accumulator. What actual operation this machine is doing is set by all these different configurations which is up here. So these can be set for example here to put it in the count mode or here into the clear mode. What we're going to do right now is we're going to multiply. Then I pull the start lever. One of the really cool things about this machine is that after it finishes its computation and it gets the answer it just stops on its own automatically and the way that it does here the doughing is that each time a ball gets to the end it turns the next one through its mechanism. So here this ball will get down to the end. Don't trigger the next ball in the down. The way that this machine does multiplication is by loops and additions. So we're actually doing for taking third take we're going to add it to the secundator three times. We do that in addition one bit at a time so just checking one place. Now this ball will come down and we're checking the eighth place. There's a one of the eighth place. So we add one in the eighth place to the accumulator. Now it's going to go to the two's place and there's a one in the two's place. So instead of adding one to the accumulator in two's place we reject the ball and just trigger the next place. Now we check the four's place. It's one of the four's place we add one, carry and then the eighth place then the ball keeps back out. And lastly we check the once place. So that was actually our second addition of their team. Because you didn't want to worry yet. We got one for left and the little for left. So the multiplier register started at three and it went down how many times we have left to add. So now that zero times left at 13 which actually gets placed carry carry and now we're going to use the first place to add zero. The first place is one. We add one in the first place to the accumulator. And then it won in the one's place. And then we check to see if there's any more accumulations like the answer is no. So the ball rolled down this alternate pathway here and because it went over there it didn't trigger the start level. So our multiplication is complete and let's see what answer we got. Here's the once place, two's, four's, eight's, sixties, thirty two's, sixty four's. There's a one of thirty two's place and there's a one in the four's place. So that's thirty six. Thirty six so far. There is a one in the two's place. So thirty eight. There's a one in the one's place. So thirty nine. So this is our digit cop two and it tells us that three times thirteen is thirty nine. Thank you very much.