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  2. Morse code - Wikipedia

    en.wikipedia.org/wiki/Morse_code

    The Morse code, as specified in the current international standard, International Morse Code Recommendation, ITU-R M.1677-1, [1] was derived from a much-improved proposal by Friedrich Gerke in 1848 that became known as the "Hamburg alphabet", its only real defect being the use of an excessively long code ( and later the equal duration code ...

  3. Shades of gray - Wikipedia

    en.wikipedia.org/wiki/Shades_of_gray

    Below is a chart showing the computer web color grays. An achromatic gray is a gray color in which the red, green, and blue codes are exactly equal. The web colors gray, gainsboro, light gray, dark gray, and dim gray are all achromatic colors.

  4. Category:Color codes - Wikipedia

    en.wikipedia.org/wiki/Category:Color_codes

    Download as PDF; Printable version; In other projects ... 20-pair colour code (Australia) 25-pair color code; A. ... List of electronic color code mnemonics; H ...

  5. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    Internal direct sum: if E and F are abelian subgroups of an abelian group V, notation = means that V is the direct sum of E and F; that is, every element of V can be written in a unique way as the sum of an element of E and an element of F.

  6. Ku Klux Klan - Wikipedia

    en.wikipedia.org/wiki/Ku_Klux_Klan

    He also provided secret code words to the writers of the Superman radio program, resulting in episodes in which Superman took on a thinly disguised version of the KKK. Kennedy stripped away the Klan's mystique and trivialized its rituals and code words, which may have contributed to the decline in Klan recruiting and membership. [ 183 ]

  7. GCHQ - Wikipedia

    en.wikipedia.org/wiki/GCHQ

    GCHQ was originally established after the First World War as the Government Code and Cypher School (GC&CS) [3] and was known under that name until 1946. During the Second World War it was located at Bletchley Park , where it was responsible for breaking the German Enigma codes .

  8. Modular arithmetic - Wikipedia

    en.wikipedia.org/wiki/Modular_arithmetic

    Time-keeping on this clock uses arithmetic modulo 12. Adding 4 hours to 9 o'clock gives 1 o'clock, since 13 is congruent to 1 modulo 12. In mathematics, modular arithmetic is a system of arithmetic for integers, where numbers "wrap around" when reaching a certain value, called the modulus.

  9. List of video editing software - Wikipedia

    en.wikipedia.org/wiki/List_of_video_editing_software

    The following is a list of video editing software. The criterion for inclusion in this list is the ability to perform non-linear video editing. Most modern transcoding software supports transcoding a portion of a video clip, which would count as cropping and trimming. However, items in this article have one of the following conditions: