37 Installation, maintenance and repair of fire suppression systems; Installation, maintenance and repair of fire extinguishers, fire sprinklers, fire extinguishing systems, safety and emergency evacuation equipment; Repair, maintenance and installation of fire escapes; Fire extinguisher recharging services; Installation of specialty flooring systems; Maintenance of emergency exit and emergency lighting systems, comprised of computer hardware, door lock controls, light controls, video cameras and monitors, emergency lights, power supplies, alarms, horns, strobes, emergency signaling devices, public address devices, intercoms