NOS, SGPS, S.A. provides cable and satellite television services in Portugal and internationally. It operates through Telco and Audiovisuals segments. The company operates mobile communication network, GSM/UMTS/LTE; operates electronic communications services, including data and multimedia communication services; provides IP voice, mobile virtual network operator, and consultancy and other services; and distributes cable and satellite television. It also produces and distributes films and series channels; manages the advertising space on Pay TV channels and in the cinemas; and provides product placement, sponsoring, and online presence related with content wholesale. In addition, the company engages in the production and sale of videos; cinema exhibitions and other content exhibition in movie theatres; and acquisition/negotiation of Pay TV and video-on-demand rights. Further, it provides encoding technical services and content broadcasting, and IT services, as well as publishes DVD and Blu-Ray. Additionally, the company is involved in real estate and investment management; commercialization of other public events; and production, importation, distribution, and commercialization of audiovisual products. It also carries out scientific activity and research; demonstrates, divulges, and transfers technology and training; licenses and provides engineering and consulting services; designs, constructs, manages, and exploits electronic communications networks, and their equipment and infrastructures; implements, installs, and exploits towers and other sites for the instalment of telecommunications equipment; purchases, operates, sells, and rents property and commercial establishments; and realizes urbanization and building construction. The company was formerly known as ZON Optimus, SGPS, S.A. and changed its name to NOS, SGPS, S.A. in June 2014. The company was founded in 1999 and is headquartered in Lisbon, Portugal.