“There’s a known fact in application development: ‘Developers are not users.’ Making an application that meets the goals and expectations of its users is a pretty hard task — you really need to know a lot about the potential users. On top of that, novice users will expect to be helped by the documentation, should they ever run into obstacles while using your software. Documentation can come in many formats: printed manuals, PDF/standalone documents, and online help systems. In this article, I’ll cover the online help systems provided by Apple and discuss how to develop online help for your applications.”