Atomic Design

The book that named and gave vocabulary to design systems by proposing a hierarchy — atoms, molecules, organisms, templates, pages — borrowed from chemistry to describe how interface components compose into increasingly complex structures. Frost's contribution was less the metaphor itself than the demonstration that without a shared language for component granularity, design teams and engineering teams talk past each other indefinitely. The book arrived at the moment when organisations were scaling their front-end teams and discovering that inconsistency was not a style problem but a communication problem. It remains the standard reference for anyone building or governing a design system. Free online from the author.