Over my desk at work? Well, we call them letter carrier cases at the Post Office as they aren't really desks, and we only slave behind them sorting mail for a couple hours a day before wandering around in the fresh air.
Mine has enough route information for a temp to come in and make a go of doing my job if I call in sick. Then there's the photographs of my wife and daughter. Then there's the list I started five years ago for the appearance dates in the spring for swallows, black flying ants, and bumble bees.
I'm looking forward to seeing how all these change over time until I retire