The CYCLADES packet switching network  was a French research network created in the early 1970s. It was developed to explore alternatives to the ARPANET design and to support network research generally. The experiences with the network had influences on the design of Internet protocols.

The Cyclades (; , ) are a Pre-Greek island group in the Aegean Sea, southeast of mainland Greece and a former administrative prefecture of Greece. They are one of the island groups which constitute the Aegean archipelago. The name refers to the islands around (κυκλάς) the sacred island of Delos. The Cyclades is where the native Greek breed of cat (the Aegean cat) originated.