Others might also find interesting this video from 1982 where Brian Kernighan demonstrates building a simple spell checker using UNIX command line utilities: <a href="https:&#x2F;&#x2F;youtu.be&#x2F;XvDZLjaCJuw?t=5m15s" rel="nofollow">https:&#x2F;&#x2F;youtu.be&#x2F;XvDZLjaCJuw?t=5m15s</a>