Not many people know this, but if you hold down the Alt key while entering 0216 on the numeric keypad,and then release the Alt key, the symbol Ø will appear.
* NOW *
Get someone in the office to try and make the symbol. You'll giggle with glee at their frustrated combinations of 0,/,and backspaces. (I had to buy lunch for one Project Manager after he ran the same sheet of paper through the printer twice and overlayed "O" with "/").
These characters run from 0032 (equivalent to hitting the spacebar) to 0255 "ÿ" if you
need any others.