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  2. History of PDF - Wikipedia

    en.wikipedia.org/wiki/History_of_PDF

    The Portable Document Format (PDF) was created by Adobe Systems, introduced at the Windows and OS/2 Conference in January 1993 and remained a proprietary format until it was released as an open standard in 2008. Since then, it has been under the control of an International Organization for Standardization (ISO) committee of industry experts.

  3. Religious Studies Review - Wikipedia

    en.wikipedia.org/wiki/Religious_Studies_Review

    Religious Studies Review (RSR) is the journal of the Council of Societies for the Study of Religion (CSSR), which is based at Rice University. The journal is published quarterly by John Wiley & Sons. RSR reviews over 1,000 titles annually in review essays and critical notes. [1]

  4. Source criticism - Wikipedia

    en.wikipedia.org/wiki/Source_criticism

    Source criticism (or information evaluation) is the process of evaluating an information source, i.e.: a document, a person, a speech, a fingerprint, a photo, an observation, or anything used in order to obtain knowledge. In relation to a given purpose, a given information source may be more or less valid, reliable or relevant.

  5. Historical source - Wikipedia

    en.wikipedia.org/wiki/Historical_source

    A secondary source is one that gives information about a primary source. In a secondary source, the original information is selected, modified and arranged in a suitable format. Secondary sources involve generalization, analysis, interpretation, or evaluation of the original information.

  6. Intelligence source and information reliability - Wikipedia

    en.wikipedia.org/wiki/Intelligence_source_and...

    The source reliability is rated between A (history of complete reliability) to E (history of invalid information), with F for source without sufficient history to establish reliability level. The information content is rated between 1 (confirmed) to 5 (improbable), with 6 for information whose reliability can not be evaluated.

  7. Wikipedia:Evaluating sources - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Evaluating_sources

    Sources of information are commonly categorized as primary, secondary, or tertiary sources.In brief, a primary source is one close to the event with firsthand knowledge (for example, an eyewitness); a secondary source is at least one step removed (for example, a book about an event written by someone not involved in it); and a tertiary source is an encyclopaedia or textbook that provides a ...

  8. Historical method - Wikipedia

    en.wikipedia.org/wiki/Historical_method

    Historical method is the collection of techniques and guidelines that historians use to research and write histories of the past. Secondary sources, primary sources and material evidence such as that derived from archaeology may all be drawn on, and the historian's skill lies in identifying these sources, evaluating their relative authority, and combining their testimony appropriately in order ...

  9. Royal Signals and Radar Establishment - Wikipedia

    en.wikipedia.org/wiki/Royal_Signals_and_Radar...

    Queen Elizabeth II and Prince Philip visiting RSRE in 1976. RSRE was formed in 1976 by an amalgamation of previous research organizations; these included the Royal Radar Establishment (RRE), itself derived from the World War II-era Telecommunications Research Establishment, the Signals Research and Development Establishment (SRDE) in Christchurch, Dorset, and the Services Electronic Research ...