NTT stands for Nippon Telegraph and Telephone Corporation, a major telecommunications company based in Japan. Founded in 1952, it provides a wide range of services, including fixed-line and mobile communications, internet services, and data centers. NTT is one of the largest telecommunications companies in the world, playing a crucial role in Japan's communication infrastructure. The company operates several subsidiaries, such as NTT Docomo, which focuses on mobile services, and NTT Communications, which offers global data and cloud services. NTT is also involved in research and development, contributing to advancements in technology and telecommunications.