[randomdata]

Linux is just a kernel, and only a Unix-like kernel at that. It is not an operating system. You're probably thinking of the GNU/Linux operating system, but then GNU is a recursive acronym for GNU's Not Unix. Android forgoes the GNU part, but maintains the Linux part (albeit with some patches).

[pavlov]

Yeah, that's the point. Symbian was built from scratch for mobile devices, kernel and everything on top. Anything Linux-based isn't.

[randomdata]

While both written from scratch at some point in history, the trouble is that Linux is the newer one. Symbian is rebranded EPOC, which is older than Linux.