I stumbled across this document which though going into enormous details about electrolytic capacitors also details other types and is packed full of information.
http://www.cde.com/resources/catalogs/AEappGUIDE.pdf
Can we have a topic / bucket / area where we can drop links or PDFs that are gold mines of information? This could then become a shared resource rather than spread on bookmark lists or directories across the community.
There are many resources out there already I know but a little bit of sharing is always good.