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  2. History of PDF - Wikipedia

    en.wikipedia.org/wiki/History_of_PDF

    PDF/X (since 2001 - series of ISO 15929 and ISO 15930 standards) - a.k.a. "PDF for Exchange" - for the Graphic technology - Prepress digital data exchange - (working in ISO Technical committee 130), based on PDF 1.3, PDF 1.4 and later also PDF 1.6; PDF/A (since 2005 - series of ISO 19005 standards) - a.k.a. "PDF for Archive" - Document ...

  3. Lists of unsolved problems - Wikipedia

    en.wikipedia.org/wiki/Lists_of_unsolved_problems

    List of unsolved problems may refer to several notable conjectures or open problems in various academic fields: Natural sciences, engineering and medicine [ edit ]

  4. List of global issues - Wikipedia

    en.wikipedia.org/wiki/List_of_global_issues

    This list of global issues presents problems or phenomena affecting people around the world, including but not limited to widespread social issues, economic issues, and environmental issues. Organizations that maintain or have published an official list of global issues include the United Nations, and the World Economic Forum.

  5. Common Open Software Environment - Wikipedia

    en.wikipedia.org/wiki/Common_Open_Software...

    Besides the opening and standardization of the UNIX brand, the most notable product of the COSE initiative was the Common Desktop Environment, or CDE. CDE was an X11-based user environment jointly developed by HP, IBM, and Sun, with an interface and productivity tools based on OSF's Motif graphical widget toolkit. [6]

  6. Single UNIX Specification - Wikipedia

    en.wikipedia.org/wiki/Single_UNIX_Specification

    Beginning in 1998, a joint working group of IEEE, ISO JTC 1 SC22 and The Open Group known as the Austin Group began to develop the combined standard that would be known as the core of Single UNIX Specification, Version 3 and as POSIX.1-2001. It was released on January 30, 2002.

  7. List of unsolved problems in mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.

  8. 1170s - Wikipedia

    en.wikipedia.org/wiki/1170s

    June 14 – King Henry II has his 15-year-old son, Henry the Young King, crowned by Roger, Archbishop of York, as junior king and heir to the English throne. The coronation drives Pope Alexander III to allow the exiled Thomas Becket (whose privilege as Archbishop of Canterbury to crown English monarchs has been infringed) to lay an interdict on England as punishment, and this threat forces ...

  9. Thomas Becket - Wikipedia

    en.wikipedia.org/wiki/Thomas_Becket

    This is an accepted version of this page This is the latest accepted revision, reviewed on 4 February 2025. Archbishop of Canterbury from 1162 to 1170, Christian martyr "Thomas a Becket" redirects here. Not to be confused with Thomas à Beckett (disambiguation). For the school in Northampton, see Thomas Becket Catholic School. For other uses, see Thomas Beckett. This article contains too many ...