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  2. Universally unique identifier - Wikipedia

    en.wikipedia.org/wiki/Universally_unique_identifier

    This number would be equivalent to generating 1 billion UUIDs per second for about 86 years. A file containing this many UUIDs, at 16 bytes per UUID, would be about 43.4 exabytes (37.7 EiB). The smallest number of version-4 UUIDs which must be generated for the probability of finding a collision to be p is approximated by the formula

  3. Unique identifier - Wikipedia

    en.wikipedia.org/wiki/Unique_identifier

    random numbers, selected from a number space much larger than the maximum (or expected) number of objects to be identified. Although not really unique, some identifiers of this type may be appropriate for identifying objects in many practical applications and are, with informal use of language, still referred to as "unique"

  4. Snowflake ID - Wikipedia

    en.wikipedia.org/wiki/Snowflake_ID

    The first 41 (+ 1 top zero bit) bits convert to decimal as 367597485448. Add the value to the X Epoch of 1288834974657 (in Unix time milliseconds), [ 5 ] the Unix time of the tweet is therefore 1656432460.105 : June 28, 2022 16:07:40.105 UTC.

  5. User identifier - Wikipedia

    en.wikipedia.org/wiki/User_identifier

    NFSv4 was intended to help avoid numeric identifier collisions by identifying users (and groups) in protocol packets using textual “user@domain” names rather than integer numbers. However, as long as operating-system kernels and local file systems continue to use integer user identifiers, this comes at the expense of additional translation ...

  6. Help:Displaying a formula - Wikipedia

    en.wikipedia.org/wiki/Help:Displaying_a_formula

    Later on, the text can refer to this equation by its number using syntax like this: As seen in equation ({{EquationNote|1}}), example text... The result looks like this: As seen in equation , example text... The equation number produced by {{EquationNote}} is a link that the user can click to go immediately to the cited equation.

  7. Type conversion - Wikipedia

    en.wikipedia.org/wiki/Type_conversion

    In the code above, two strings are declared, one of each different type (SYSTEM_STRING is the Eiffel compliant alias for System.String). Because System.String does not conform to STRING_8 , then the assignment above is valid only if System.String converts to STRING_8 .

  8. List of computing and IT abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_computing_and_IT...

    CAT—Computer-aided translation; CAQ—Computer-aided quality assurance; CASE—Computer-aided software engineering; cc—C compiler; CC—Carbon copy; CD—Compact Disc; CDE—Common Desktop Environment; CDMA—Code-division multiple access; CDN—Content delivery network; CDP—Cisco Discovery Protocol; CDP—Continuous data protection; CD-R ...

  9. Code 128 - Wikipedia

    en.wikipedia.org/wiki/Code_128

    The special symbol FNC4 ("Function 4"), present only in code sets A and B, can be used to encode all the Latin-1 characters in a Code 128 barcode. [ 3 ] When a single 'FNC4' is present in a string, the following symbol is read like ASCII, but the value is incremented by +128, thus taking the higher range of the ISO-8859-1 table.