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  2. Percentile - Wikipedia

    en.wikipedia.org/wiki/Percentile

    Each standard deviation represents a fixed percentile. Thus, rounding to two decimal places, −3σ is the 0.13th percentile, −2σ the 2.28th percentile, −1σ the 15.87th percentile, 0σ the 50th percentile (both the mean and median of the distribution), +1σ the 84.13th percentile, +2σ the 97.72nd percentile, and +3σ the 99

  3. QR code - Wikipedia

    en.wikipedia.org/wiki/QR_Code

    The generator polynomial specified for the (26,19,2) code, is: = + + + + + + +, which may also be written in the form of a matrix of decimal coefficients: [1 127 122 154 164 11 68 117] The 17-byte long message "www.wikipedia.org" as hexadecimal coefficients (ASCII values), denoted by M1 through M17 is:

  4. BASIC interpreter - Wikipedia

    en.wikipedia.org/wiki/BASIC_interpreter

    Tiny BASIC was on the simple end: it only converted the line number from its decimal format into binary. For instance, the line number "100" became a single byte value, $64, making it smaller to store in memory as well as easier to look up in machine code (a few designs of Tiny BASIC permitted line numbers from only 1 to 254 or 255, although ...

  5. Diving cylinder - Wikipedia

    en.wikipedia.org/wiki/Diving_cylinder

    The pressure vessel is a seamless cylinder normally made of cold-extruded aluminum or forged steel. [5] Filament wound composite cylinders are used in fire fighting breathing apparatus and oxygen first aid equipment because of their low weight, but are rarely used for diving, due to their high positive buoyancy.