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  2. Payment card number - Wikipedia

    en.wikipedia.org/wiki/Payment_card_number

    Payment card numbers are composed of 8 to 19 digits, [1] The leading six or eight digits are the issuer identification number (IIN) sometimes referred to as the bank identification number (BIN). [2]: 33 [3] The remaining numbers, except the last digit, are the individual account identification number. The last digit is the Luhn check digit.

  3. GUID Partition Table - Wikipedia

    en.wikipedia.org/wiki/GUID_Partition_Table

    4 bytes: Revision number of header - 1.0 (00h 00h 01h 00h) for UEFI 2.10 12 (0x0C) 4 bytes: Header size in little endian (in bytes, usually 5Ch 00h 00h 00h or 92 bytes) 16 (0x10) 4 bytes: CRC32 of header (offset +0 to +0x5c) in little endian, with this field zeroed during calculation 20 (0x14) 4 bytes: Reserved; must be zero 24 (0x18) 8 bytes

  4. Binary-coded decimal - Wikipedia

    en.wikipedia.org/wiki/Binary-coded_decimal

    The IBM 1400 series are character-addressable machines, each location being six bits labeled B, A, 8, 4, 2 and 1, plus an odd parity check bit (C) and a word mark bit (M). For encoding digits 1 through 9 , B and A are zero and the digit value represented by standard 4-bit BCD in bits 8 through 1 .

  5. Binary file - Wikipedia

    en.wikipedia.org/wiki/Binary_file

    A binary file is a computer file that is not a text file. [1] The term "binary file" is often used as a term meaning "non-text file". [ 2 ] Many binary file formats contain parts that can be interpreted as text; for example, some computer document files containing formatted text , such as older Microsoft Word document files, contain the text of ...

  6. Location transparency - Wikipedia

    en.wikipedia.org/wiki/Location_transparency

    In computer networks, location transparency is the use of names to identify network resources, rather than their actual location. [1] [2] For example, files are accessed by a unique file name, but the actual data is stored in physical sectors scattered around a disk in either the local computer or in a network. In a location transparency system ...

  7. Memory address - Wikipedia

    en.wikipedia.org/wiki/Memory_address

    In a computer using virtual memory, accessing the location corresponding to a memory address may involve many levels. In computing, a memory address is a reference to a specific memory location in memory used by both software and hardware. [1] These addresses are fixed-length sequences of digits, typically displayed and handled as unsigned ...

  8. Cue sheet (computing) - Wikipedia

    en.wikipedia.org/wiki/Cue_sheet_(computing)

    The data files referred to by the cue sheet may be audio files (commonly in MP3 or WAV format), or plain disc images, usually with a .bin extension. When used for disc images, the format is usually called BIN/CUE, indicating that it stores a disc image composed of one cue sheet file and one or more .bin files.

  9. List of file signatures - Wikipedia

    en.wikipedia.org/wiki/List_of_file_signatures

    In the table below, the column "ISO 8859-1" shows how the file signature appears when interpreted as text in the common ISO 8859-1 encoding, with unprintable characters represented as the control code abbreviation or symbol, or codepage 1252 character where available, or a box otherwise. In some cases the space character is shown as ␠.