According to some simple Googling [0] seems to be the oldest occurrence of this. [0] http://athena.ecs.csus.edu/~brodyr/jokes/engr/sign-engr.html http://athena

According to some simple Googling [0] seems to be the oldest occurrence of this. [0] http://athena.ecs.csus.edu/~brodyr/jokes/engr/sign-engr.html http://athena.ecs.csus.edu/~brodyr/jokes/engr/sign-engr.html