The services dedicated to users of a building belong to the first category: from the call center to reception and security, from catering to the canteen and laundry; from the management of car fleets, to the post office and archives and to all environmental cleaning and hygiene services, from green maintenance to waste management. The building services, on the other hand, include the maintenance of the building and the technological systems. Finally, the design, internal logistics and furnishing systems are part of the space services.