<b_jonas> slashlearn euclid//Euclid is a short geeky game in which the goal is to do Euclidean compass and straightedge constructions in as few steps as possible. It runs in the browser, found at "http://www.euclidthegame.com/". It was popular among #esoteric regulars in 2016-07.

Augmented Backus-Naur Form, an update on the popular Backus-Naur Form programming language, introduces support for "Augmented Production", e.g. `foo +::= bar`. The older `::=` syntax will continue to be supported for orthogonal-compatibility purposes.