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  2. Partially ordered set - Wikipedia

    en.wikipedia.org/wiki/Partially_ordered_set

    In mathematics, especially order theory, a partial order on a set is an arrangement such that, for certain pairs of elements, one precedes the other. The word partial is used to indicate that not every pair of elements needs to be comparable; that is, there may be pairs for which neither element precedes the other.

  3. History of atomic theory - Wikipedia

    en.wikipedia.org/wiki/History_of_atomic_theory

    For instance, the fact that two liters of hydrogen will react with just one liter of oxygen to produce two liters of water vapor (at constant pressure and temperature) suggested that a single oxygen molecule splits in two in order to form two molecules of water. The formula of water is H 2 O, not HO. Avogadro measured oxygen's atomic weight to ...

  4. Embryology - Wikipedia

    en.wikipedia.org/wiki/Embryology

    1 - morula, 2 - blastula 1 - blastula, 2 - gastrula with blastopore; orange - ectoderm, red - endoderm. Embryology (from Greek ἔμβρυον, embryon, "the unborn, embryo"; and -λογία, -logia) is the branch of animal biology that studies the prenatal development of gametes (sex cells), fertilization, and development of embryos and fetuses.

  5. World Wide Web - Wikipedia

    en.wikipedia.org/wiki/World_Wide_Web

    The World Wide Web (WWW or simply the Web) is an information system that enables content sharing over the Internet through user-friendly ways meant to appeal to users beyond IT specialists and hobbyists. It allows documents and other web resources to be accessed over the Internet according to specific rules of the Hypertext Transfer Protocol ...

  6. Print Wikipedia - Wikipedia

    en.wikipedia.org/wiki/Print_Wikipedia

    Print Wikipedia is an art project by Michael Mandiberg that included a printed edition of 106 volumes of the English Wikipedia as it existed on 7 April 2015. The bound paper volumes, each running 700 pages, represented a fraction of the 7,473 total volumes necessary to render the encyclopedia's extant text on that date.

  7. Community of practice - Wikipedia

    en.wikipedia.org/wiki/Community_of_practice

    A community of practice (CoP) is a group of people who "share a concern or a passion for something they do and learn how to do it better as they interact regularly". The concept was first proposed by cognitive anthropologist Jean Lave and educational theorist Etienne Wenger in their 1991 book Situated Learning (Lave & Wenger 1991).

  8. Content delivery network - Wikipedia

    en.wikipedia.org/wiki/Content_delivery_network

    A content delivery network or content distribution network ( CDN) is a geographically distributed network of proxy servers and their data centers. The goal is to provide high availability and performance ("speed") by distributing the service spatially relative to end users. CDNs came into existence in the late 1990s as a means for alleviating ...

  9. Sort your emails in AOL Mail - AOL Help

    help.aol.com/articles/sort-your-emails-in-aol-mail

    Sorting your emails from your folders has never been easier in AOL Mail. Use the sorting feature regardless of the folder you are in to rearrange the emails and find the ones important, click on Sort on top right of your emails list and choose the option that best suits your need. • Date - Newest on top. • Date - Oldest on top. • Unread ...