This document describes the ETOS operating system designed for the PDP8 computer. ETOS is an integrated hardware and software package that supports up to 16 users, providing each with a virtual stand-alone PDP8 environment with 32K of address space. The system addresses the limitations of previous single-user environments (batch and interactive) by implementing multi-user time-sharing with features like sophisticated file security, device independence, real-time application support, and a virtual front panel (SCALE) for debugging and management. The system is designed to be modular and flexible to accommodate future technological growth.
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