What Does CTSS Stand For?

CTSS stands for Compatible Time Sharing System

The Compatible Time Sharing System (CTSS) is an early time-sharing operating system developed in the early 1960s at the Massachusetts Institute of Technology (MIT). It allowed multiple users to simultaneously access a single computer system, enabling efficient resource sharing and interaction through terminals. CTSS introduced several innovative concepts, such as file permissions and virtual memory, and laid the groundwork for future multitasking operating systems, significantly influencing the development of computing technologies.