How to Design a Good API and Why It Matters

Google TechTalks · Talk · YouTube title: How To Design A Good API and Why it Matters

Why it's here

HN repeatedly names it the best resource on API design, a staple answer to any 'how do I design an API' question.

What it covers

Joshua Bloch's Google Tech Talk on how to design good APIs and why it matters, with concrete principles and examples. It treats every programmer as an occasional API designer.