Surgery sites, for short, can be abbreviated as ORCS (4 letters) and ORS (3 letters). ORCS stands for Operating Room Complexes, which are large facilities that contain multiple operating rooms, recovery rooms, and other areas for patient care. ORS stands for Operating Rooms, which are smaller facilities that contain one or more operating rooms and other areas for patient care. Both ORCS and ORS provide a safe and sterile environment for surgeons to perform surgeries.