The first computer operating system was created in the early 1960s, and there isn't a single individual credited with its invention. Instead, various people and research teams contributed to its development. Initially, hardware manufacturers provided basic software systems to manage computer resources, but it was technically not considered an operating system. The invention and development of operating systems is a result of collaborative efforts from various researchers and organizations working on different types of computer systems.

A notable early operating system was the Compatible Time-Sharing System (CTSS), developed by a team led by Fernando J. Corbató at the Massachusetts Institute of Technology (MIT). CTSS, which started operation in 1961, was one of the first time-sharing systems, allowing multiple users to access computer resources simultaneously.

Another significant early operating system is IBM's OS/360, which was developed in the mid-1960s. The development was led by Fred Brooks, who was the project manager for the IBM System/360 mainframe computer family. The OS/360 was designed to support a range of System/360 computers, and it laid the foundation for many other IBM operating systems that followed.
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