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  2. Reverse Polish notation - Wikipedia

    en.wikipedia.org/wiki/Reverse_Polish_notation

    Video: Keys pressed for calculating eight times six on a HP-32SII (employing RPN) from 1991. Reverse Polish notation (RPN), also known as reverse Łukasiewicz notation, Polish postfix notation or simply postfix notation, is a mathematical notation in which operators follow their operands, in contrast to prefix or Polish notation (PN), in which operators precede their operands.

  3. LZ77 and LZ78 - Wikipedia

    en.wikipedia.org/wiki/LZ77_and_LZ78

    In the PalmDoc format, a length–distance pair is always encoded by a two-byte sequence. Of the 16 bits that make up these two bytes, 11 bits go to encoding the distance, 3 go to encoding the length, and the remaining two are used to make sure the decoder can identify the first byte as the beginning of such a two-byte sequence.

  4. Leet - Wikipedia

    en.wikipedia.org/wiki/Leet

    Leet originated within bulletin board systems (BBS) in the 1980s, [1] [2] where having "elite" status on a BBS allowed a user access to file folders, games, and special chat rooms. The Cult of the Dead Cow hacker collective has been credited with the original coining of the term, in their text-files of that era. [ 3 ]

  5. Run-length encoding - Wikipedia

    en.wikipedia.org/wiki/Run-length_encoding

    Run-length encoding compresses data by reducing the physical size of a repeating string of characters. This process involves converting the input data into a compressed format by identifying and counting consecutive occurrences of each character. The steps are as follows: Traverse the input data.

  6. Geographic coordinate conversion - Wikipedia

    en.wikipedia.org/wiki/Geographic_coordinate...

    A coordinate system conversion is a conversion from one coordinate system to another, with both coordinate systems based on the same geodetic datum.

  7. Birthday problem - Wikipedia

    en.wikipedia.org/wiki/Birthday_problem

    The reverse problem is to find, for a fixed probability p, the greatest n for which the probability p(n) is smaller than the given p, or the smallest n for which the probability p(n) is greater than the given p. [citation needed] Taking the above formula for d = 365, one has

  8. C++ - Wikipedia

    en.wikipedia.org/wiki/C++

    C++ (/ ˈ s iː p l ʌ s p l ʌ s /, pronounced "C plus plus" and sometimes abbreviated as CPP) is a high-level, general-purpose programming language created by Danish computer scientist Bjarne Stroustrup.

  9. Water - Wikipedia

    en.wikipedia.org/wiki/Water

    To observe the fundamental stretching absorption spectrum of water or of an aqueous solution in the region around 3,500 cm −1 (2.85 μm) [90] a path length of about 25 μm is needed. Also, the cuvette must be both transparent around 3500 cm −1 and insoluble in water; calcium fluoride is one material that is in common use for the cuvette ...