it is accurate indeed. what's not accurate, and is a common source of disagreement, is the misrepresentation and rewriting of history that some people engage in. it's not just that Linux is not an operating system (Mr Torvalds set out to write one but ended up writing a kernel and adopting GNU for the userland), it's that Linux hasn't even qualified as FS (or OSS) after Mr Torvalds started integrating binary-only blobs in his Linux distribution, and that was before OSS was even coined!