Yes, this is what most of the other comments aren&#x27;t emphasizing—resource forks had a standardized format and Apple even shipped a tool for visualizing&#x2F;editing them. They were also extended so you could tag and embed any arbitrary data you wanted to. This was <i>fantastic</i> because it allowed me as a young programmer to poke around in real shipping products and see how they organized things. The same way you might poke around inside an .app wrapper or a .xib file nowadays. But 30 years ago!<p>From today&#x27;s perspective, they are just there for backwards compatibility.