NOS, SGPS S.A. is a Portuguese telecommunications and media company established in 1994, originally under the name TVCabo. The company provides a range of services, including mobile and fixed telephony, cable television, satellite television, and internet. NOS emerged from the merger of two major Portuguese telecommunications entities in 2013: Zon Multimédia and Sonae's Optimus Telecommunications.
The company's history includes several significant changes in branding and structure. Zon Multimédia, a former media arm of Portugal Telecom, was initially known as PT Multimédia. In 2013, it merged with Sonae's Optimus Telecommunications to form ZON Optimus. The company underwent another rebranding in May 2014, consolidating the ZON and Optimus brands into the single brand "NOS". In addition to its core telecommunications services, NOS owns premium movie channels TVCine, holds a 25% stake in the Sport TV television network, and operates NOS Audiovisuais, a home-video and cinema film distributor. It also operates the largest cinema chain in Portugal, Nos Cinema.