What is "code" anyway except instructions? The Harvard-Von-Neumann distinction is really a continuum. Even today's computers draw important distinctions between

What is "code" anyway except instructions? The Harvard-Von-Neumann distinction is really a continuum. Even today's computers draw important distinctions between data and code: for example, we have separate data and instruction caches, and Linux has special caching behavior for PROT_EXEC pages. (The latter is an annoyance, BTW: there's no reason to treat Java bytecode, say, differently from PROT_EXEC pages. Executable protection should have nothing to do with active or inactive list membership.)