This manual serves as the definitive technical specification for the ARM architecture, addressing the core question of how developers can effectively interface with ARM and Thumb instruction sets. Authored by the architects responsible for the specification, the text provides a rigorous framework for understanding the programmer's model, memory management, and system control functions. It synthesizes complex hardware logic into a structured reference for engineers and systems programmers.

Experts and systems engineers regard this as the foundational reference for ARM-based development. Readers frequently note the high level of technical density, making it an essential resource for those working directly with low-level hardware specifications.