When Cornell began remodeling Wilch Apartments, the individual apartments were numbered 1, 2, 3, 4 and 5. Before students moved in, we renumbered those units to 100, 200, 300, 400 and 500 (the old apartment 1 became 100, the old apartment 2 became 200, etc.). That allowed us to number the individual bedrooms for the purposes of work orders and housing assignments. Though we updated most references to the new numbering, you may occasionally see references to the old numbering.
Apartment 100 (click on the image for a larger view)