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  2. Vortex generator - Wikipedia

    en.wikipedia.org/wiki/Vortex_generator

    A vortex generator (VG) is an aerodynamic device, consisting of a small vane usually attached to a lifting surface (or airfoil, such as an aircraft wing) [1] or a rotor blade of a wind turbine. [2] VGs may also be attached to some part of an aerodynamic vehicle such as an aircraft fuselage or a car.

  3. Pigpen cipher - Wikipedia

    en.wikipedia.org/wiki/Pigpen_cipher

    The pigpen cipher uses graphical symbols assigned according to a key similar to the above diagram. [1]The pigpen cipher (alternatively referred to as the masonic cipher, Freemason's cipher, Rosicrucian cipher, Napoleon cipher, and tic-tac-toe cipher) [2] [3] is a geometric simple substitution cipher, which exchanges letters for symbols which are fragments of a grid.

  4. Pseudorandom number generator - Wikipedia

    en.wikipedia.org/wiki/Pseudorandom_number_generator

    A pseudorandom number generator (PRNG), also known as a deterministic random bit generator (DRBG), [1] is an algorithm for generating a sequence of numbers whose properties approximate the properties of sequences of random numbers.

  5. Fractal-generating software - Wikipedia

    en.wikipedia.org/wiki/Fractal-generating_software

    MojoWorld Generator – a defunct landscape generator for Windows; openPlaG – creates fractals by plotting simple functions; Picogen - a cross platform open source terrain generator; Sterling – freeware software for Windows; Terragen – a fractal terrain generator that can render animations for Windows and Mac OS X

  6. Message authentication code - Wikipedia

    en.wikipedia.org/wiki/Message_authentication_code

    Formally, a message authentication code (MAC) system is a triple of efficient [4] algorithms (G, S, V) satisfying: G (key-generator) gives the key k on input 1 n, where n is the security parameter. S (signing) outputs a tag t on the key k and the input string x. V (verifying) outputs accepted or rejected on inputs: the key k, the string x and ...

  7. MeCard (QR code) - Wikipedia

    en.wikipedia.org/wiki/MeCard_(QR_code)

    A structured representation of the name of the person. When a field is divided by a comma (,), the first half is treated as the last name and the second half is treated as the first name. N:Doe,John; NICKNAME: 3.0: Familiar name for the object represented by this MeCard: NICKNAME:Johnny; NOTE: 1.0

  8. Barcode - Wikipedia

    en.wikipedia.org/wiki/Barcode

    A barcode or bar code is a method of representing data in a visual, ... Name Notes App Clip Code: ... Free Online Barcode Generator This ...

  9. Huffman coding - Wikipedia

    en.wikipedia.org/wiki/Huffman_coding

    Huffman tree generated from the exact frequencies of the text "this is an example of a huffman tree". Encoding the sentence with this code requires 135 (or 147) bits, as opposed to 288 (or 180) bits if 36 characters of 8 (or 5) bits were used (This assumes that the code tree structure is known to the decoder and thus does not need to be counted as part of the transmitted information).