Flughafen Zürich AG engages in the operation of Zurich Airport. The company is headquartered in Kloten, Zuerich and currently employs 2,130 full-time employees. The company went IPO on 2000-04-17. The firm offers access to international, national and regional transport networks. The firm operates in four segments: the Aviation flight operations segment encompasses the construction, operation and maintenance of the airport operating infrastructure; the Aviation security segment covers the installation, operation and maintenance of security infrastructure and all processes of direct relevance to security, which includes all systems and their operation and maintenance designed to prevent actions of any kind that affect the security of commercial civil aviation; the Non-aviation segment encompasses all activities relating to the development, marketing and operation of the commercial infrastructure at Zurich Airport, and the Aviation aircraft noise segment.