499 BCE: Histiaeus of Miletus shaves the heads of messengers, tattoos messages on their scalps, and sends them after their hair has grown back to hide the message.Notable moments and techniques mentioned include: The talk is based on “The Code Book” by Simon Sign. Next was groovecoder, who shared a preview of a talk about cryptography throughout history. It also can control lights connected to the board. Tessel is small circuit board that runs Node.js projects Gopher Tessel reads sensors (such as the temperature sensor) connected to the board, and exposes their values via Gopher. emceeaich: Gopher Tesselįirst up was emceeaich, who shared Gopher Tessel, a project for running a Gopher server (an Internet protocol that was popular before the World Wide Web) on a Tessel. There’s also a recording available courtesy of Air Mozilla. There’s a wiki page available with a list of the presenters, as well as links to their presentation materials. Once a month, web developers from across the Mozilla Project get together to talk about our side projects and drink, an occurrence we like to call “Beer and Tell”.

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