|Traded as||Euronext: NOS|
|Founded||1994 (as PT Multimédia)|
2007 (spin-off from Portugal Telecom)
2013 (merger with Optimus Telecomunicações)
2014 (as NOS)
|Miguel Almeida (CEO)|
Isabel dos Santos
|Products||Cable television (HFC), FTTH, broadband Internet access, landline, mobile operator, television broadcasting, film distribution, movie theater operation|
|Revenue||EUR1.59 billion (2019)|
|EUR641 million (2019)|
|EUR143 million (2019)|
|EUR3.088 billion (2019)|
|EUR1 billion (2019)|
Number of employees
|Subsidiaries||NOS Comunicações (100%), NOS Madeira Comunicações, S.A. (78%), NOS Açores Comunicações, S.A. (84%), NOS Audiovisuais (100%), NOS Cinemas (100%), Sport TV (25%), Dreamia (50%) and ZAP (30%)|
NOS, SGPS S.A. is a Portuguese telecommunications and media company who provides mobile and fixed telephony, cable television, satellite television and internet. The company resulted from the merger in 2013 of two of the country's major telecommunications companies: Zon Multimédia (formerly known as PT Multimédia, a spun-off media arm of Portugal Telecom) and Sonae'Optimus Telecommunications. 
NOS owns premium movie channels TVCine and has a 25% stake in the Sport TV television network. It also operates 4 channels in joint-venture with AMC Networks International Southern Europe. NOS Audiovisuais (formerly ZON Lusomundo) is a home-video and cinema film distributor and operates Nos Cinema the largest cinema chain of Portugal.
NOS was founded as TVCabo in 1994, and was the third cable operator to be founded in Portugal (the first was the regional Cabo TV Madeirense, which was founded in 1992, followed by Bragatel early on in 1994). The first customer was connecter in November 1994. Initially the channel offer consisted of thirty channels and the number of Portuguese-speaking channels was initially limited to the terrestrial channels, with the number of Portuguese-speaking channels increasing as the years went on.
The company might be considered a Portuguese dot-com. In the PT Multimédia days, it brought Portugal Telecom SAPO (a successful web portal and search engine, sold to its parent company in 2005), Lusomundo (a successful movie distributor, movie theater operator included in the spun off company and, formerly, the owner of the Diário de Notícias newspaper and the TSF radio, which were sold to Controlinveste the same year as SAPO was sold) and several TV channels such as SportTV, CNL (now SIC Notícias) and TVCine (MOV was only created after the spin-off).
On 17 January 2008, ZON announced it would acquire TVTEL, its main competitor in both cable and satellite broadcasting in Porto region. Thus, ZON was strengthening its position due to the appearance of a new significant rival, MEO from Portugal Telecom, using IPTV and satellite broadcasting systems, and there remains one other more cable television and internet operator in Portugal, Cabovisão.
On 29 September 2008, ZON Multimédia announced the new mobile product ZON Mobile (MVNO), the first real quad play operator in Portugal.
On 17 March 2010, ZON renamed its cable and satellite television service as ZON TV, dropping the 16-year-old TV Cabo brand.
In 2013, the merger with Optimus (which also includes Optimus Clix, Optimus Kanguru, Optimus Tag, Smart and WTF) was approved and the company was renamed to ZON Optimus. In May 2014, the two brands ZON and Optimus were merged into one single brand, called "NOS" (which is pronounced just like "nós", the Portuguese for "we", "nodes" or "knots").