This volume serves as a centralized repository for standardized graphical symbols used across various engineering and technical disciplines. Alvin Arnell, an experienced technical writer and engineer, compiles a vast array of industry-standard notations to facilitate clear communication in technical documentation and schematics. The text provides a systematic framework for identifying and applying symbols in fields ranging from electrical engineering to mechanical drafting.

Experts recognize this work as a foundational reference for historical engineering standards and technical drafting practices. Readers frequently note the density of the technical illustrations and the utility of the categorized indexing system for archival research.