Sure. I had a knowledge database back in 2002-2004. It was an application that I used every time I was learning something. It wasn't too advanced, I had to do

Sure. I had a knowledge database back in 2002-2004. It was an application that I used every time I was learning something. It wasn't too advanced, I had to do everything manually, but now I am going to automate as much as I can. Here is how it worked, every time I'd learn something from the web, I'd copy/paste the key information into the application from the source I was reading, add tags, wget the page (so that i had local copy of the database) and link to local copy. This was I was accumulating tons of information. Some days I'd review everything I had accumulated and add some comments with where it could be relevant. When I needed something, I'd just enter some phrase or keyword that I remembered, like 'linux security chmod' and I would locate the key facts about this topic that I had stored. Now that I think of it, it can be argued that you can do the same with Google, but it would be a bit slower, you'd have to see which site was it and you'd sometimes make mistakes of locating the right one. But if it's in the database, there are just a few results and you can recall precisely which one is the right because you added the result. It's you personal knowledge database, not the knowledge database of the whole universe as Google is.