10 equipment carriers for supporting and suspending other medical or surgical equipment for use in a hospital or medical environment, namely, booms and columns; service heads for providing electrical power, gas and communications connections to operate other medical or surgical equipment, which service heads are sold as a component of the equipment carriers; ventilation equipment, namely, smoke evacuation and air purifiers, which ventilation equipment is sold as a component of the equipment carriers; furniture for supporting, storing and organizing medical and surgical equipment, which is specially adapted for the medical and surgical equipment; surgical lighting, namely, operating theater lights