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  2. Initial and terminal objects - Wikipedia

    en.wikipedia.org/wiki/Initial_and_terminal_objects

    In Ring, the category of rings with unity and unity-preserving morphisms, the ring of integers Z is an initial object. The zero ring consisting only of a single element 0 = 1 is a terminal object. In Rig, the category of rigs with unity and unity-preserving morphisms, the rig of natural numbers N is an initial object.

  3. Initial sound table - Wikipedia

    en.wikipedia.org/wiki/Initial_sound_table

    The first initial sound table was created in 1658 by John Amos Comenius in Orbis Pictus, a picture book intended for children. They were popularized in the German-speaking areas by Jürgen Reichen who used initial sound tables to assist students to recognise initial sounds and to get first reading and writing skills.

  4. List of graphical user interface elements - Wikipedia

    en.wikipedia.org/wiki/List_of_graphical_user...

    An icon is a small picture that represents objects such as a file, program, web page, or command. They are a quick way to execute commands, open documents, and run programs. Icons are also very useful when searching for an object in a browser list, because in many operating systems all documents using the same extension will have the same icon.

  5. Zayin - Wikipedia

    en.wikipedia.org/wiki/Zayin

    The Proto-Sinaitic glyph may have been called ziqq, may not have been based on a hieroglyph, and may have depicted a "fetter". [1]An alternative view is that it is based on the "copper ingot" hieroglyph in the form of an axeblade, after noting that the name "zayin" has roots in Aramaic to refer to "Arms," "Armor," and "Metal used for arms."

  6. Ideogram - Wikipedia

    en.wikipedia.org/wiki/Ideogram

    Ideograms that represent physical objects by visually resembling them are called pictograms. Numerals and mathematical symbols are ideograms, for example 1 'one', 2 'two', + 'plus', and = 'equals'. The ampersand & is used in many languages to represent the word and, originally a stylized ligature of the Latin word et.

  7. Precursors of film - Wikipedia

    en.wikipedia.org/wiki/Precursors_of_film

    In the early days of film the word "photoplay" was quite commonly used for motion pictures. This illustrates how a movie can be thought of as a photographed play.Much of the production for a live-action movie is similar to that of a theatre play, with very similar contributions by actors, a theatre director/film director, producers, a set designer, lighting designer, costume designer, composer ...

  8. Found photography - Wikipedia

    en.wikipedia.org/wiki/Found_photography

    In found photography, non-art photos are used as art, usually by simply reinterpreting them. [1] [2] Although found objects considered broadly have been a part of artistic practice since Marcel Duchamp’s Bottle Rack (1914), found photos used analogously by artists are a far more recent phenomenon.

  9. Category theory - Wikipedia

    en.wikipedia.org/wiki/Category_theory

    Schematic representation of a category with objects X, Y, Z and morphisms f, g, g ∘ f. (The category's three identity morphisms 1 X, 1 Y and 1 Z, if explicitly represented, would appear as three arrows, from the letters X, Y, and Z to themselves, respectively.) Category theory is a general theory of mathematical structures and their relations.