Etos - A Multi-Lingual Time Sharing System for the PDP8

This document describes ETOS (EDUCOMP's Time-shared Operating System), a system designed for the PDP8 computer. ETOS aims to integrate hardware and software to support up to 16 users, providing each with the experience of a stand-alone 64K byte system.

Key points include:

• System Goals: ETOS was designed to provide convenient remote access, continuous operation, scalability, reliable file management, and security, while balancing the needs of diverse users (educational, industrial, and administrative).
• Technical Architecture: ETOS uses virtual storage and a time-share control module to manage memory efficiently, allowing users to operate as if they had a 32K word machine. It removes the limitations of previous systems like TSS/8 by providing a full 32K virtual address space.
• Compatibility: ETOS enables users to leverage the capabilities of OS/8 in a multi-user environment. It supports batch, interactive, and real-time processing concurrently.
• Management & Security: The system includes the SCALE executive for virtual machine control, robust file security with password/account protection, and file quotas to prevent disk space abuse.
• Modularity: The system is built with a modular monitor design, allowing for the addition of new features and specialized device handlers without overwhelming the core system.

Ultimately, ETOS seeks to provide a sophisticated yet easy-to-use environment that prioritizes the needs of the user, supporting diverse applications from engineering calculations to student learning.