Lose anything important? It happens to us all, and that is why there is a PHS Lost and Found.
Swing by the display case in the IMC (the doors to the right of the Kingsman) if you’re missing anything such as glasses, retainers, and keys etc.
If you have lost some electronics, that is a different story. To recover, cellphones, iPods, flashdrives, and other digital media, you need to visit the Penn Security office at the north end of the cafeteria.