When I worked IT for a school district at the beginning of my career (2006-2007), I was blown away that every school had a MASSIVE server room (my office at each school - the MDF). 3-5 racks filled (depending on school size and connection speed to the central DC - data closet) 50-75% was networking equipment (5 PCs per class hardwired), 10% was the Novell Netware server(s) and storage, the other 15% was application storage for app distributions on login.