H http://dcoj.wmh3.com/cscos/h/ http://dcoj.wmh3.com/cscos/h/ U https://github.com/upcrob/u-programming-language https://github.com/upcrob/u-programming-langua

H http://dcoj.wmh3.com/cscos/h/ http://dcoj.wmh3.com/cscos/h/ U https://github.com/upcrob/u-programming-language https://github.com/upcrob/u-programming-language W https://www.vttoth.com/CMS/projects/49-w-a-simple-programming-language https://www.vttoth.com/CMS/projects/49-w-a-simple-programmin... Y https://dl.acm.org/citation.cfm?id=954278 https://dl.acm.org/citation.cfm?id=954278 and https://esolangs.org/wiki/Y_(programming_language) https://esolangs.org/wiki/Y_(programming_language) Z notation and also Z++ https://en.wikipedia.org/wiki/Z%2B%2B https://en.wikipedia.org/wiki/Z%2B%2B