hat less at less point at star
backbrace double base pound space bar
dash at cash and slash base rate
wow open tab at bar is great
semi backquote plus cash huh DEL
comma pound double tilde bar close BEL

This poem can be written entirely in non-alphanumeric characters. Unfortunately because of the restrictions on characters imposed by HTML, I can't show it here. (Weird piece of geek history from my CS lecturer a few years back.)