Sony developed the PlayStation family of video-game consoles.
PlayStation is a Sony gaming brand launched with the original PlayStation in Japan in 1994. The console later expanded internationally and helped establish Sony as one of the leading companies in the video-game industry.
Sony’s gaming business operates through Sony Interactive Entertainment. The PlayStation family includes home consoles, handheld products, online services, digital stores, and first-party studios that develop games for the platform.
Microsoft is the company behind Xbox, while Nintendo develops systems such as the Switch. Those brands are frequent alternatives in this question, but PlayStation specifically belongs to Sony. Sony’s wider businesses also include music, films, television, cameras, sensors, and consumer electronics.