This text investigates the design principles and implementation strategies of macro processors to determine their viability as machine-independent tools for systems programming. P. J. Brown, an expert in software portability, utilizes a comparative analysis of existing macro systems to argue for a standardized approach to assembly language extensions. The work provides a technical framework for developers to create portable code across disparate hardware architectures.

Experts recognize this work as a foundational text for understanding the evolution of systems software and portability. Readers frequently note the technical density of the prose, which is intended for experienced systems programmers and computer science researchers.