NOS, SGPS, S.A. provides cable and satellite television services in Portugal and internationally. The company operates through Telco and Audiovisuals segments. It engages in the cable and satellite television distribution; operation of mobile communication network, such as GSM/UMTS/LTE; operation of electronic communications services, including data and multimedia communication services; and provision of mobile virtual network operator, IP voice, and consultancy services. The company 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, it is involved in television and content production business; the production and sale of videos; cinema and other content exhibition in movie theatres; the acquisition of Pay TV and video-on-demand rights; and the distribution of movies and series. Further, the company provides DVD and Blu-Ray editing services; encoding technical services and content broadcasting services; and IT managed services, cloud solutions, and business continuity and information security support services. Additionally, it designs, constructs, and manages electronic communications networks, and their equipment and infrastructure; deploys, installs, and manages towers and other sites for the roll-out of telecommunication equipment; produces and sells of audiovisual products; and commercializes electronic communication products and equipment. It is also involved in real estate and investment management; the purchase, sale, renting, and operation of property and commercial establishments; and the realization of 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. NOS, SGPS, S.A. operates as a subsidiary of Zopt SGPS SA.