This volume investigates the complex web of corporate ownership, subsidiaries, and inter-company relationships defining the computer industry during its formative years. The authors, Computer Consultants Limited, utilize a systematic data-driven approach to map the organizational hierarchies and financial ties that linked various hardware manufacturers, software developers, and service providers.

Experts recognize this work as a specialized reference tool for historians and industry analysts tracking the consolidation of the early computing market. Readers frequently note the dense, directory-style presentation of the data, which serves primarily as a foundational resource for organizational research.