One of the wonderful things about the internet is that it is now possible -- for the first time in history -- to get instant information about most any subject. For example, if you want to learn about minor chords, you just type "minor chords" or "minor piano chords" in a search box on Google or Yahoo or MSN or any search engine, and presto! -- in a matter of seconds you can be learning minor chords. There are even videos on minor chords as well as photos and illustrations, and on and on.
Then if you really love what you see on the net, you can often get in-depth piano courses on the subject on DVD's you can order online. Think about that -- just over 10 years ago you would have had to either enroll in a college course or seek out a private piano teacher to learn these things. Now you can do it in a flash!
Do we live in an amazing age, or what?