I'm really confused. This looks like someone's private notes on various tech subjects. Kind of like the notes I might keep in my notebook. Very little context, and hard for me to make anything out of this. Am I approaching this wrong?
Look at the Compilers page, and all the real estate at the top devoted to parsing. Then look at Lisp ^_^. (You did do SICP under Brian Harvey, right?)
More seriously, at the very least I expect some of those pages to help me not overlook something important in the future in a project or two I'm thinking about. Those are of course fields where I have a grounding; if someone else looks at a page and feels completely lost, that's probably a signal to learn the foundations, which the notes can help in, as topics to search on, for judging books and other guides for their coverage (again touching on the completeness idea), etc.
The act of writing stuff down helps me organize thoughts and juxtapose related things as I'm learning them. There's definitely some content I haven't looked up again after that, but I surprise myself with how easily and thoroughly I forget something I once mastered, and how frequently I want to look up things exactly as I wrote them. I rely primarily on search for subsequent lookup. (Similarly, I'm also surprised at how frequently I Google for a question only to find that I had posted it years ago to a mailing list or StackOverflow - makes me feel very glad that I asked!)
I guess it depends on what you do, but as a generalist software engineer, I feel there's just too much crap to know, and I could never keep it all in my head.