Bill Inmon publishes 'Building the Data Warehouse'

Inmon's seminal book provided a comprehensive blueprint for designing and implementing data warehouses, formally outlining the architecture that necessitated robust ETL processes.

Significance

This book codified the theory and practice of data warehousing, making the 'extract, transform, load' process an indispensable component of any enterprise-level analytical system. It became a bible for data architects worldwide.