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  2. 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.

  3. Lists of unsolved problems - Wikipedia

    en.wikipedia.org/wiki/Lists_of_unsolved_problems

    Download as PDF; Printable version; In other projects ... List of unsolved problems may refer to several notable conjectures or open problems in various academic ...

  4. Becket controversy - Wikipedia

    en.wikipedia.org/wiki/Becket_controversy

    The Becket controversy or Becket dispute was the quarrel between Archbishop of Canterbury Thomas Becket and King Henry II of England from 1163 to 1170. [1] The controversy culminated with Becket's murder in 1170, [2] and was followed by Becket's canonization in 1173 and Henry's public penance at Canterbury in July 1174.

  5. 1170s - Wikipedia

    en.wikipedia.org/wiki/1170s

    1.10.1.6 Mesoamerica. 1. ... Download as PDF; Printable version; In other projects ... The 1170s was a decade of the Julian Calendar which began on January 1, 1170 ...

  6. 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 ...

  7. 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 ...

  8. Time formatting and storage bugs - Wikipedia

    en.wikipedia.org/wiki/Time_formatting_and...

    On 5 January 1975, the 12-bit field that had been used for dates in the TOPS-10 operating system for DEC PDP-10 computers overflowed, in a bug known as "DATE75". The field value was calculated by taking the number of years since 1964, multiplying by 12, adding the number of months since January, multiplying by 31, and adding the number of days since the start of the month; putting 2 12 − 1 ...

  9. 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.