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  2. Numeric precision in Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Numeric_precision_in...

    Excel maintains 15 figures in its numbers, but they are not always accurate; mathematically, the bottom line should be the same as the top line, in 'fp-math' the step '1 + 1/9000' leads to a rounding up as the first bit of the 14 bit tail '10111000110010' of the mantissa falling off the table when adding 1 is a '1', this up-rounding is not undone when subtracting the 1 again, since there is no ...

  3. Filename - Wikipedia

    en.wikipedia.org/wiki/Filename

    Some filesystems restrict the length of filenames. In some cases, these lengths apply to the entire file name, as in 44 characters in IBM z/OS. [2] In other cases, the length limits may apply to particular portions of the filename, such as the name of a file in a directory, or a directory name.

  4. ISO 9660 - Wikipedia

    en.wikipedia.org/wiki/ISO_9660

    Since amendment 1 (or ECMA-119 3rd edition, or "JIS X 0606:1998 / ISO 9660:1999"), a much wider variety of file trees can be expressed by the EVD system. There is no longer any character limit (even 8-bit characters are allowed), nor any depth limit or path length limit. There still is a limit on name length, at 207.

  5. Exponentiation - Wikipedia

    en.wikipedia.org/wiki/Exponentiation

    and the second-order term does not affect the limit, yielding ⁡ ⁡ = ⁡ (+). Euler's number can be defined as e = exp ⁡ ( 1 ) {\displaystyle e=\exp(1)} . It follows from the preceding equations that exp ⁡ ( x ) = e x {\displaystyle \exp(x)=e^{x}} when x is an integer (this results from the repeated-multiplication definition of the ...

  6. Shapefile - Wikipedia

    en.wikipedia.org/wiki/Shapefile

    Each of the variable-length records includes a record-header component and a record-contents component. A detailed description of the file format is given in the ESRI Shapefile Technical Description. [1] This format should not be confused with the AutoCAD shape font source format, which shares the .shp extension.

  7. Raised-cosine filter - Wikipedia

    en.wikipedia.org/wiki/Raised-cosine_filter

    The raised-cosine filter is a filter frequently used for pulse-shaping in digital modulation due to its ability to minimise intersymbol interference (ISI). Its name stems from the fact that the non-zero portion of the frequency spectrum of its simplest form ( β = 1 {\displaystyle \beta =1} ) is a cosine function, 'raised' up to sit above the f ...

  8. ext4 - Wikipedia

    en.wikipedia.org/wiki/Ext4

    ext4 (fourth extended filesystem) is a journaling file system for Linux, developed as the successor to ext3.. ext4 was initially a series of backward-compatible extensions to ext3, many of them originally developed by Cluster File Systems for the Lustre file system between 2003 and 2006, meant to extend storage limits and add other performance improvements. [4]