Stock them in the attic for sentimental/nostalgic value (e.g. a book about the architecture of the MC6802 chip might be considered "unwanted" in the current era, but is *was* where I started assembler and having fun writing disassemblers)
Snippets of code should be wrapped in
<code> tags not<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).