How did they do this without transistors? The only thing I can find is this diagram here which looks like a small box: <a href="http:&#x2F;&#x2F;www.twinbeech.com&#x2F;images&#x2F;TURRETS&#x2F;cfc&#x2F;CFC%20computer197web.JPG" rel="nofollow">http:&#x2F;&#x2F;www.twinbeech.com&#x2F;images&#x2F;TURRETS&#x2F;cfc&#x2F;CFC%20computer19...</a> which is smaller than a vacuum tube. I&#x27;d assume you&#x27;d need vector calculus to calculate the path of a bullet?