A great question from @jenstrickland which can clarify a lot for folks learning the differences between the internet the web can refine understanding about what parts make which layer and the role of those parts. Changes have occurred I will write generally. Questions welcome.

The internet itself provides the platform via the TCP/IP stack. The web itself has three primary pieces that come together as the World Wide Web. The hypertext markup language HTML, the hypertext transfer protocol http, and the URL uniform resource locator.

HTML comes from the standardized generalized markup language written by Charles Goldfarb it is very verbose mostly because of his work as an attorney. Sgml is considered a metal language this means other languages and applications are made with its guidelines.