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  2. vol (command) - Wikipedia

    en.wikipedia.org/wiki/Vol_(command)

    Drive: This command-line argument specifies the drive letter of the disk for which to display the volume label and serial number. Note: On Windows, the volume serial number is displayed only for disks formatted with MS-DOS version 4.0 or later. OS/2 allows the user to specify more than one drive. The vol command displays the volume labels ...

  3. Serial number - Wikipedia

    en.wikipedia.org/wiki/Serial_number

    The serial number follows the aircraft throughout its period of service. In 2009, the U.S. FDA published draft guidance for the pharmaceutical industry to use serial numbers on prescription drug packages. [2] This measure is intended to enhance the traceability of drugs and to help prevent counterfeiting.

  4. Check digit - Wikipedia

    en.wikipedia.org/wiki/Check_digit

    Add the digits (up to but not including the check digit) in the even-numbered positions (second, fourth, sixth, etc.) to the result. Take the remainder of the result divided by 10 (i.e. the modulo 10 operation). If the remainder is equal to 0 then use 0 as the check digit, and if not 0 subtract the remainder from 10 to derive the check digit.

  5. List of DOS commands - Wikipedia

    en.wikipedia.org/wiki/List_of_DOS_commands

    cmd.exe in Windows NT 2000, 4DOS, 4OS2, 4NT, and a number of third-party solutions allow direct entry of environment variables from the command prompt. From at least Windows 2000, the set command allows for the evaluation of strings into variables, thus providing inter alia a means of performing integer arithmetic.

  6. Product key - Wikipedia

    en.wikipedia.org/wiki/Product_key

    A product key, also known as a software key, serial key or activation key, is a specific software-based key for a computer program. It certifies that the copy of the program is original. It certifies that the copy of the program is original.

  7. DNS zone transfer - Wikipedia

    en.wikipedia.org/wiki/DNS_zone_transfer

    The preamble portion of zone transfer relies on the serial number, and only the serial number, to determine whether a zone's data have changed, and thus whether the actual data transfer is required. For some DNS server packages, the serial numbers of SOA resource records are maintained by administrators by hand.

  8. AOL Help

    help.aol.com

    Get answers to your AOL Mail, login, Desktop Gold, AOL app, password and subscription questions. Find the support options to contact customer care by email, chat, or phone number.

  9. Sequence number - Wikipedia

    en.wikipedia.org/wiki/Sequence_number

    A sequence number is a consecutive number in a sequence of numbers, usually of real integers (natural numbers).Sequence numbers have many practical applications. They can be used, among other things, as part of serial numbers on manufactured parts, in case management, [1] or in databases as a surrogate key for registering and identifying unique entries in a table [2] [3] (in which case it is ...