Grateful

In my desk drawer at work, the top right drawer, there is a sliding tray that has many small compartments. In the bottom of one of the tiny compartments is molded the image of a paper clip. I am grateful for that molded image of a paper clip. If it weren't for that image, I would be totally lost as to what to put in that compartment. I would like to thank the desk designers of the world for their thoughtfulness in leaving me that important clue so that I would not be so foolish as to put, say, my push pins in that compartment. I salute your brilliance.
But what are the other compartements for?