Wikipedia

“La computación en nube, del inglés cloud computing, es un paradigma que permite ofrecer servicios de computación a través de Internet. La nube es una metáfora de Internet”

NIST -National Institute of Standards and Technology

“Cloud computing is a model for enabling convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction”

Gartner

“ A style of Computing where scalable and elastic IT capabilities are provided ‘as a service’ to multiple customers using Internet technologies“

Web2.0 Journal: Twenty-One Experts Define Cloud Computing

“It is the infrastructural paradigm shift that is sweeping across the Enterprise IT world, but how is it best defined? I refer of course to ‘Cloud Computing’ – the phenomenon that has as many definitions as there are squares on a chess-board. To try and narrow it down we bring here a round-up of some recent attempts to bring welcome precision where there risks being unnecessary vagueness.”

IDC: Defining “Cloud Services” and “Cloud Computing”

“An emerging IT development, deployment and delivery model, enabling real-time delivery of products, services and solutions over the Internet (i.e., enabling cloud services)”