Interactive Application System

This document describes the Interactive Application System (IAS) Version 3.4, a general-purpose operating system designed for various PDP-11, Q-bus, and MicroPDP-11 processors. IAS offers three primary operating modes: Real-time, Multi-user, and Timesharing, allowing for concurrent real-time, interactive, and batch processing. The system features a sophisticated heuristic scheduler, robust program and data protection, and a flexible Command Language Interpreter (CLI) structure, including a Program Development System (PDS) and System Control Interface (SCI). Key utilities and facilities include support for file management, multiple editors, shadow recording for data availability, and multi-stream batch processing. The document also details comprehensive hardware requirements, software licensing options, and installation considerations for version 3.4.