The telecommunications sector includes all companies specialising in the provision of mobile, telephone and Internet networks. In the narrower sense, telecommunications today is understood as data exchange using electrical engineering, electronics, radio technology and other modern transmission technology. The first telecommunications services in this sense were telegraphy (telex) and telephony, also known as telecommunications. Today, telecommunications equipment is an elementary component of the infrastructure. In the NPS Benchmarks overview you can find companies like Vodafone, O2 or 1&1.