A catenet is a system of packet-switched communication networks interconnected
via gateways. The Internet is a catenet. The term "internet" (with a lower-case 'i') later superseded the term "catenet".
"The Catenet Model for internetworking" (http://www.isi.edu/in-notes/ien/ien48.txt) (Cerf, V., DARPA Information Processing Techniques Office, IEN 48, July 1978.)