This page contains few useful links. They are mainly here as a reference for myself.
Links are divided under few headlines, giving some impression about contents of a specific link.
Here is some comment needed. Eric's treasure trove projects are public knowledge databases in specific areas. These are VERY useful in my job and research. For example, when encountering an unfamiliar mathematical concept, the Eric's treasure trove for Mathematics is a good place to start finding things out. Partial update 31st of May 1999.