The telecommunications sector evolved from the telegraph, where communication took days, to modern mobile technology, where large amounts of data can be sent in seconds. These shifts are due to technology, and they changed how people live and do business.
At one time, telecommunications required physical wires connecting homes and businesses. In modern society, this is changing with mobile technology and wireless technology becoming the primary form of communication.
The major segments within the telecommunications sector are wireless communications, communications equipment, processing systems and products, long-distance carriers, domestic telecom services, foreign telecom services and diversified communication services.