Magnets and electricity are funny things. The language of electromagnetism currently permeates our discourse. You think you know what you're talking about, and then, bam, it turns out that you don't. This is especially true of "amplifiers," which sound like blindingly obvious gadgets that give an extra oomph to an input current. There's all kinds of uses for a gadget that turns a small input into a large output. But that's not what they do at all, and it isn't until you understand what they actually do that you appreciate why conversations about historic amplifiers so often turn to logic gates.
Which turns out to be pretty important when everyone's talking about these new "computers" they have now. I have included a Kerrison Predictor, a very simple computing fire director, here because it contains a magslip element. Magslips are more often described as electric motors than as computing elements, probably because if we don't distinguish "control" from "computing" discussions about automation become impossible. Magslips also don't use the "one weird trick" that makes magnetic amplifiers possible. See? You think you know what's going on, and then the language betrays you!


