Sony is a Japanese multinational conglomerate corporation that operates in a variety of industries, including electronics, entertainment, and technology. It was established in 1946 as Tokyo Tsushin Kogyo by Masaru Ibuka and Akio Morita. Sony is responsible for the Sony Groups Entertainment, Technology & Services (ET&S) business. Some of the key businesses and operating companies under Sony Corporation of America include Sony Electronics, Sony Music Entertainment, Sony Pictures Entertainment, and Sony Interactive Entertainment. Sony is known for creating a wide range of products, including the transistor radio TR-55, the home video tape recorder CV-2000, the portable audio player Walkman, and the compact disc player CDP-101. Sony also introduced the home video game console PlayStation. Today, Sony creates and delivers more entertainment experiences to more people than anyone else on earth, with some 900 million Sony devices in hands and homes worldwide.