nouns - Should the words "internet" and "web" be capitalized?

There seems to be some inconsistency on whether people capitalize the words internet and web (as in World Wide Web) as proper nouns. What is the official ruling on when or if these words should be capitalized?

Obviously, I am not asking about when they are the first word in a sentence or in the title of a book or other publication.

Example:

"The web is the most commonly known
feature of the Internet."

Answer

My reasoning is that there is really only one network named Internet - therefore it's the Internet, while "web" is a more generic term, meaning any network (but probably referring to YouTube anyway ;).