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Information can be defined exactly by set theory: "Information is a selection from the domain of information". The "domain of information" is a set that the sender and receiver of information must know before exchanging information. Digital information, for example, consists of building blocks that are all number sequences.
Information theory is the mathematical study of the quantification, storage, and communication of information. The field was originally established by the works of Harry Nyquist and Ralph Hartley, in the 1920s, and Claude Shannon in the 1940s. [1] : vii It is at the intersection of electronic engineering, mathematics, statistics, computer ...
Category. v. t. e. Information science is an academic field which is primarily concerned with analysis, collection, classification, manipulation, storage, retrieval, movement, dissemination, and protection of information. [1] Practitioners within and outside the field study the application and the usage of knowledge in organizations in addition ...
Information literacy. The Association of College and Research Libraries defines information literacy as a "set of integrated abilities encompassing the reflective discovery of information, the understanding of how information is produced and valued and the use of information in creating new knowledge and participating ethically in communities ...
The Information Age (also known as the Third Industrial Revolution, Computer Age, Digital Age, Silicon Age, New Media Age, Internet Age, or the Digital Revolution [1]) is a historical period that began in the mid-20th century.
An information system ( IS) is a formal, sociotechnical, organizational system designed to collect, process, store, and distribute information. [1] From a sociotechnical perspective, information systems are composed by four components: task, people, structure (or roles), and technology. [2] Information systems can be defined as an integration ...
Information science. Information technology ( IT) is a set of related fields that encompass computer systems, software, programming languages, and data and information processing, and storage. [1] IT forms part of information and communications technology (ICT). [2] An information technology system ( IT system) is generally an information ...
Information management ( IM) is the appropriate and optimized capture, storage, retrieval, and use of information. It may be personal information management or organizational. Information Management for organizations concerns a cycle of organizational activity: the acquisition of information from one or more sources, the custodianship and the ...