Eric Schlaepfer runs the popular engineering Twitter account @TubeTimeUS, where he posts cross section photos, discusses retrocomputing and reverse engineering, and investigates engineering accidents. Some of his better-known projects include the MOnSter 6502 (the world's largest 6502 microprocessor, made out of individual transistors) and the Snark Barker (a retro recreation of the famous Sound Blaster sound card).

Windell H. Oskay is the co-founder of Evil Mad Scientist Laboratories, where he designs robots. A longtime photographer, he holds a B.A. in Physics and Mathematics from Lake Forest College and a Ph.D. in Physics from the University of Texas at Austin. He is the author of The Annotated Build-It-Yourself Science Laboratory.