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The European Space Agency (ESA) is an intergovernmental organisation dedicated to the exploration of space, currently with 20 member states. Established in 1975 and headquartered in Paris, France, ESA has a staff of more than 2,000 with an annual budget of about €4.02 billion / US$5.38 billion (2012).
All our coverage on Evernote. Founded by Stepan Pachikov in 2007, Evernote is a cross-platform note taking app. It is available on the web and many desktop and mobile platforms, allowing users to take and access notes across many devices.
In production and development, open source is a philosophy, or pragmatic methodology that promotes free redistribution and access to an end product's design and implementation details. Before the phrase open source became widely adopted, developers and producers used a variety of terms for the concept; open source gained hold with the rise of the Internet, and the attendant need for massive retooling of the computing source code.
In physics, energy is an indirectly observed quantity which comes in many forms, such as kinetic energy, potential energy, radiant energy, and many others; which are listed in this summary article. This is a major topic in science and technology and this article gives an overview of its major aspects, and provides links to the many specific articles about energy in its different forms and contexts.