Wondering why Plumb Bob seems to be obsessed with clovers? Well, the answer is quite simple: St. Patrick is the patron saint of all engineers! We pay tribute to him each I.T. Week by bringing out the blarney stone for people to kiss. Inscribed into the stone is "Erin go Braugh," which is loosely translated as, “St. Patrick was an engineer!” Many engineers believe that St. Patrick drove the snakes out of Ireland with his engineering skills, and others credit him with the invention of calculus.