Jeff Bezos's 2002 API Mandate

Jeff Bezos issued an infamous mandate requiring all Amazon teams to build services with well-defined APIs, communicating only through them, and externalizing their data where possible. This forced a fundamental architectural shift internally.

Significance

This internal directive, while not directly related to AWS's public launch, was the philosophical and architectural precursor that made AWS possible. It forced Amazon to build a robust, service-oriented infrastructure that could then be productized.