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  2. Recycling codes - Wikipedia

    en.wikipedia.org/wiki/Recycling_codes

    Recycling codes on products. Recycling codes are used to identify the materials out of which the item is made, to facilitate easier recycling process.The presence on an item of a recycling code, a chasing arrows logo, or a resin code, is not an automatic indicator that a material is recyclable; it is an explanation of what the item is made of.

  3. 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.

  4. 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

  5. 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 .

  6. 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 ...

  7. 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 ...

  8. Trash (computing) - Wikipedia

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

    Prior to Windows Vista, a file in the Recycle Bin is stored in its physical location and renamed as D<original drive letter of file><#>.<original extension>. [19] A hidden file called info2 ( info in Windows 95 without the Windows Desktop Update ) stores the file's original path and original name in binary format. [ 19 ]

  9. 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 ...