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  2. ASCII - Wikipedia

    en.wikipedia.org/wiki/ASCII

    Eventually, as 8-, 16-, and 32-bit (and later 64-bit) computers began to replace 12-, 18-, and 36-bit computers as the norm, it became common to use an 8-bit byte to store each character in memory, providing an opportunity for extended, 8-bit relatives of ASCII. In most cases these developed as true extensions of ASCII, leaving the original ...

  3. Graph paper - Wikipedia

    en.wikipedia.org/wiki/Graph_paper

    Isometric graph paper or 3D graph paper is a triangular graph paper which uses a series of three guidelines forming a 60° grid of small triangles. The triangles are arranged in groups of six to make hexagons. The name suggests the use for isometric views or pseudo-three-dimensional views. Among other functions, they can be used in the design ...

  4. ZX Spectrum - Wikipedia

    en.wikipedia.org/wiki/ZX_Spectrum

    The ZX Spectrum (UK: / z ɛ d ɛ k s /) is an 8-bit home computer developed and marketed by Sinclair Research.Considered one of the most influential computers ever made, it is also one of the best-selling British computers ever, with over five million units sold.

  5. Paper size - Wikipedia

    en.wikipedia.org/wiki/Paper_size

    9+3⁄4 × 13+3⁄4. 7∶5. The most common paper sizes used for commercial and industrial printing in Colombia are based upon a size referred to as pliego that is ISO B1 (707 mm × 1000 mm) cut to full decimetres. Smaller sizes are derived by halving as usual and just get a vulgar fraction prefix: 1⁄2 pliego and 1⁄4 pliego.

  6. Ruler - Wikipedia

    en.wikipedia.org/wiki/Ruler

    A variety of rulers A 2 m (6 ft 6 + 3 ⁄ 4 in) carpenter's rule Retractable flexible rule or tape measure A closeup of a steel ruler A ruler in combination with a letter scale. A ruler, sometimes called a rule, scale or a line gauge or meter stick, is an instrument used to make length measurements, whereby a length is read from a series of markings called "rules" along an edge of the device. [1]

  7. Golomb ruler - Wikipedia

    en.wikipedia.org/wiki/Golomb_ruler

    In mathematics, a Golomb ruler is a set of marks at integer positions along a ruler such that no two pairs of marks are the same distance apart. The number of marks on the ruler is its order, and the largest distance between two of its marks is its length. Translation and reflection of a Golomb ruler are considered trivial, so the smallest mark ...

  8. ABACABA pattern - Wikipedia

    en.wikipedia.org/wiki/ABACABA_pattern

    DABACABA patterns in (3- bit) binary numbers. The ABACABA pattern is a recursive fractal pattern that shows up in many places in the real world (such as in geometry, art, music, poetry, number systems, literature and higher dimensions). [1][2][3][4] Patterns often show a D ABACABA type subset. AA, ABBA, and ABAABA type forms are also considered.

  9. 6 - Wikipedia

    en.wikipedia.org/wiki/6

    6 is the atomic number of carbon. [55] Carbon-12, its most stable isotope, has six protons, six neutrons, and six electrons. The sixfold symmetry of snowflakes arises from the hexagonal crystal structure of ordinary ice. [56] A hexamer is an oligomer made of six subunits.