RSTS/E

RSTS/E (Resource Sharing Time-Sharing Executive) is an early computer operating system developed in the 1970s that manages multiple users and tasks simultaneously. It allows different people to access and work on a shared computer system at the same time, using terminals connected to the machine. RSTS/E handles resource allocation, scheduling, and user permissions, ensuring efficient and secure operation. It was popular in educational and business environments for its flexibility and support for programming languages, making it a foundational system in the evolution of multi-user computing.