This guide details the advanced programming and hardware capabilities of the Acorn Electron for serious users. It supplements the standard user guide by covering both software and hardware aspects, offering in-depth information for programmers. The book is structured for easy access through extensive indexing and cross-referencing, ensuring that users can quickly find the specific technical details they need.

This technical reference is designed for users who require a deep understanding of the Acorn Electron's capabilities beyond basic operation. The inclusion of a complete circuit diagram and detailed explanations of low-level functions like ULA programming and interrupt handling suggests a focus on hardware and software interaction. Its structure, emphasizing extensive indexing and cross-referencing, points to its utility as a practical tool for programmers and technicians working with the system.