There was this project to replace Sparcs with R/S 6000 workstations for a group of traders running computationally intense applications, many of which were written in a local APL dialect known as A+. Rather than compensate the traders with coffee mugs or t-shirts for their pain and suffering, I made cards that sat on their keyboards. On one side was the A+ keyboard layout and on the other commonly used function key bindings.

However for the developers I culled some representative quotes from the project mailing list each month and put these on the back of the cards instead of the keyboard layout - which we all knew by muscle.