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  2. List of file signatures - Wikipedia

    en.wikipedia.org/wiki/List_of_file_signatures

    List of file signatures. This is a list of file signatures, data used to identify or verify the content of a file. Such signatures are also known as magic numbers or Magic Bytes. Many file formats are not intended to be read as text. If such a file is accidentally viewed as a text file, its contents will be unintelligible.

  3. Twitter - Wikipedia

    en.wikipedia.org/wiki/Twitter

    X Logo used since 2023 [a] X homepage visited while logged out in July 2024 Formerly Twitter (2006–2023) Type of site Social networking service Available in Multilingual Founded March 21, 2006 ; 18 years ago (2006-03-21), in San Francisco, California, U.S. Area served Worldwide, except blocking countries Owner Odeo (March–October 2006) Obvious Corporation (2006–2007) Twitter, Inc. (2007 ...

  4. AArch64 - Wikipedia

    en.wikipedia.org/wiki/AArch64

    AArch64. Armv8-A platform with Cortex-A57 / A53 MPCore big.LITTLE CPU chip. AArch64 or ARM64 is the 64-bit Execution state of the ARM architecture family. It was first introduced with the Armv8-A architecture, and had many extension updates. [1]

  5. apk (file format) - Wikipedia

    en.wikipedia.org/wiki/Apk_(file_format)

    The Android Package with the file extension apk [1] is the file format used by the Android operating system, and a number of other Android-based operating systems for distribution and installation of mobile apps, mobile games and middleware. A file using this format can be built from source code written in either Java or Kotlin .

  6. Pixmania - Wikipedia

    en.wikipedia.org/wiki/Pixmania

    Pixmania (styled PIXmania), once known as Fotovista, was a French-based e-commerce website, founded in 2000. It promoted a variety of products, including consumer electronics and baby products, with turnover of over € 300million in 2013. [1] It operated a website and until 2013 ran brick-and-mortar retail stores in Europe.

  7. Barker code - Wikipedia

    en.wikipedia.org/wiki/Barker_code

    A Barker code or Barker sequence is a finite sequence of N values of +1 and −1, with the ideal autocorrelation property, such that the off-peak (non-cyclic) autocorrelation coefficients. are as small as possible: for all . [1] Only nine Barker sequences [6] are known, all of length N at most 13. [7] Barker 's 1953 paper asked for sequences ...

  8. Binary code - Wikipedia

    en.wikipedia.org/wiki/Binary_code

    A binary code represents text, computer processor instructions, or any other data using a two-symbol system. The two-symbol system used is often "0" and "1" from the binary number system. The binary code assigns a pattern of binary digits, also known as bits, to each character, instruction, etc. For example, a binary string of eight bits (which ...

  9. Coding gain - Wikipedia

    en.wikipedia.org/wiki/Coding_gain

    For the special case of a binary linear block code with parameters (,,), the nominal spectral efficiency is = / and the nominal coding gain is kd/n. Example [ edit ] The table below lists the nominal spectral efficiency, nominal coding gain and effective coding gain at P b ( E ) ≈ 10 − 5 {\displaystyle P_{b}(E)\approx 10^{-5}} for Reed ...