Mark Veltzer's Github profile In order to contact me use Various profiles of mine typing ratatype nitrotype keybr keybr [email protected] keybr [email protected] keybr [email protected] keybr [email protected] keybr [email protected] learning duolingo udemy coursera projecteulor chess.com vocabulary stuff I want to read goodreads Sites that I use that do not have proflies brilliant audible beato hear training