A water powered binary logic gate dispay for NAND/NOR/NOT construction of an adder. Some rotary calculator examples. Napiers Bones and some worked examples.

A water powered binary logic gate dispay for NAND/NOR/NOT construction of an adder. Some rotary calculator examples. Napiers Bones and some worked examples. A Brunsviga or similar. Translucent plastic layers of a VLSI circuit which can be taken apart to discuss diffusion layers, boundaries A model of the shockley/bardeen transistor Something in the Babbage space. A linkage/bar computer, analogue computer (Norden bombsight?) A Mainframe of some kind A flipchip era PDP8 A pdp11 running, or a rpi5 running a pidp11 with Unix on it An 11 layer removable disk pack drive An ATC screen. A core memory explainer, giant size, or an ex computer core A Logo turtle in a constrained table with a PC to drive it