History: The Cycle of Centralization and Decentralization mainframe > PC > Datacenters & Cloud > Decentralized Web (1960s to mid-1980s) Mainframes and Thin Clients (1980-1999) The Personal Computing (PC) Revolution and the World Wide Web (WWW) (1999-2020) Innovation Retreats to the Datacenters: Web 2.0, the Peer to Peer Winter, the Social Web and the Cloud (2014-???) Re-Decentralization of the Web