> The Internet standards community historically differentiated between an internet, as a short-form of an internetwork, and the Internet: treating the latter as a proper noun with a capital letter, and the former as a common noun with a lower-case first letter. An internet is any set of interconnected Internet Protocol (IP) networks.
-- https://en.wikipedia.org/wiki/Capitalization_of_Internet
The Internet is the biggest internet, the biggest connected component in the graph of computer nodes.