Information in its most restricted technical sense is an ordered sequence of symbols that record or transmit a message. It can be recorded as signs, or conveyed as waves. Information is any kind of event that affects the state of a dynamic system. As a concept, however, information has many meanings.[1] Moreover, the concept of information is closely related to notions of constraint, communication, control, data, form, instruction, knowledge, meaning, mental stimulus, pattern, perception, representation, and even entropy.
Source: http://en.wikipedia.org/wiki/Information
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