Example image of eyePlorer eyePlorer map for 'Cloud computing': Computing Internet Paradigm shift Everything as a service Scalability Virtualization Abstraction Computer network diagram Metaphor Business software Computer software Data Server (computing) Web browser Autonomic Computing Cluster (computing) Computational resource Distributed computing Electricity Grid computing Loose coupling Public utility Self-management (computer science) Utility computing BitTorrent (protocol) Peer-to-peer SETI@home Volunteer computing Capital expenditure Subscription business model Multitenancy Barriers to entry Time-sharing Rate of return Service level agreement Information technology Nicholas G. Carr Electrical generator Electrical grid Data center Platform virtualization Quality of service Open source software Open standard Telephony Virtual private network 1960 John McCarthy (computer scientist) Service bureau Ramnath Chellappa