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NOS SGPS S.A. is a telecommunications and media company based in Lisbon, Portugal. It provides a variety of services, including mobile and fixed-line telecommunications, broadband internet, and subscription television. The company was formed in 2013 through the merger of Zon Multimédia and Optimus, and it now serves as a key player in the Portuguese telecom market. NOS also operates in the media sector, producing and distributing audiovisual content through various channels. The company has a strong presence throughout Portugal, leveraging its infrastructure to offer comprehensive communication solutions to both individual and corporate clients. NOS differentiates itself through its integrated service offerings and a focus on innovation in digital and media services.

Cisco Systems is the largest provider of networking equipment in the world and one of the largest software companies in the world. Its largest businesses are selling networking hardware and software (where it has leading market shares) and cybersecurity software such as firewalls. It also has collaboration products, like its Webex suite, and observability tools. It primarily outsources its manufacturing to third parties and has a large sales and marketing staff-25,000 strong across 90 countries. Overall, Cisco employs 80,000 people and sells its products globally.