Boyer-Moore (grep) : https://en.wikipedia.org/wiki/Boyer%E2%80%93Moore_string-search_algorithm https://en.wikipedia.org/wiki/Boyer%E2%80%93Moore_string-sea...

Boyer-Moore (grep) : https://en.wikipedia.org/wiki/Boyer%E2%80%93Moore_string-search_algorithm https://en.wikipedia.org/wiki/Boyer%E2%80%93Moore_string-sea... because it's cool. LR parser https://en.wikipedia.org/wiki/LR_parser https://en.wikipedia.org/wiki/LR_parser because Aho & Ullman https://en.wikipedia.org/wiki/Church_encoding https://en.wikipedia.org/wiki/Church_encoding 'cos it shows how fundamental lambda calculus is in a simple way (and how functional programming is so superior (flame wars intended :-) )