In addition to the collections of firearms and pens, there was, curiously, a museum-in-miniature of cipher machines and pieces from the early history of computing. Several large display cases contained, Frost had explained, a Fialka M-125 Soviet cipher device, an Enigma machine, a set of gears of Charles Babbage’s Difference Engine, a relay and rotary switch from Harvard’s Mark I, and a pair of printed circuit boards from the landmark early supercomputer Cray-1. Frost’s
