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  2. Part number - Wikipedia

    en.wikipedia.org/wiki/Part_number

    Example of a part number for a microcontroller. A part number (often abbreviated PN, P/N, part no., or part #) is an identifier of a particular part design or material used in a particular industry. Its purpose is to simplify reference that item. A part number unambiguously identifies a part design within a single corporation, sometimes across ...

  3. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    A general note applies generally and is not called out with flags. 2. Find number: "FN" meaning "find number" refers to the ordinal number that gives an ID tag to one of the constituents in a parts list (list of materials, bill of materials). Thus "fasten using FN7" refers to a fastener that is "find number" 7 in the list. FoS: feature of size

  4. List of 7400-series integrated circuits - Wikipedia

    en.wikipedia.org/wiki/List_of_7400-series...

    Some TTL logic parts were made with an extended military-specification temperature range. These parts are prefixed with 54 instead of 74 in the part number. [1]A short-lived 64 prefix on Texas Instruments parts indicated an industrial temperature range; this prefix had been dropped from the TI literature by 1973.

  5. Parts book - Wikipedia

    en.wikipedia.org/wiki/Parts_book

    Usually, an electronic parts catalogue enables the user to virtually disassemble the product into its components to identify the required part(s). In the automotive industry , electronic parts catalogues are also able to access specific vehicle information, usually through an online look-up of the vehicle identification number .

  6. Complex number - Wikipedia

    en.wikipedia.org/wiki/Complex_number

    A real number a can be regarded as a complex number a + 0i, whose imaginary part is 0. A purely imaginary number bi is a complex number 0 + bi , whose real part is zero. As with polynomials, it is common to write a + 0 i = a , 0 + bi = bi , and a + (− b ) i = a − bi ; for example, 3 + (−4) i = 3 − 4 i .

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  8. NATO Stock Number - Wikipedia

    en.wikipedia.org/wiki/NATO_Stock_Number

    The batch's interfix number is 1 and its serial number is 234. The Lot Number would therefore be ABC-00-A-1-234. If part of the batch was manufactured on a different or overhauled assembly line, it would receive the Lot Number ABC-00-A-1-234A. If the lot is made up of salvaged ammunition, it must be from the same Lot.

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