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  2. List of price index formulas - Wikipedia

    en.wikipedia.org/wiki/List_of_price_index_formulas

    This index uses the arithmetic average of the current and based period quantities for weighting. It is considered a pseudo-superlative formula and is symmetric. [12] The use of the Marshall-Edgeworth index can be problematic in cases such as a comparison of the price level of a large country to a small one.

  3. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    The Preview application can display PDF files, as can version 2.0 and later of the Safari web browser. System-level support for PDF allows macOS applications to create PDF documents automatically, provided they support the OS-standard printing architecture. The files are then exported in PDF 1.3 format according to the file header.

  4. Indexed file - Wikipedia

    en.wikipedia.org/wiki/Indexed_file

    An indexed file is a computer file with an index that allows easy random access to any record given its file key. The key must be such that it uniquely identifies a record. If more than one index is present the other ones are called alternate indexes. The indexes are created with the file and maintained by the system.

  5. Microsoft Excel file format - Wikipedia

    en.wikipedia.org/?title=Microsoft_Excel_file...

    Retrieved from "https://en.wikipedia.org/w/index.php?title=Microsoft_Excel_file_format&oldid=252217397"

  6. Automatic indexing - Wikipedia

    en.wikipedia.org/wiki/Automatic_indexing

    Automatic indexing is the computerized process of scanning large volumes of documents against a controlled vocabulary, taxonomy, thesaurus or ontology and using those controlled terms to quickly and effectively index large electronic document depositories. These keywords or language are applied by training a system on the rules that determine ...

  7. Machine-readable document - Wikipedia

    en.wikipedia.org/wiki/Machine-readable_document

    The Portable Document Format (PDF) is a file format used to present documents in a manner independent of application software, hardware, and operating systems. Each PDF file encapsulates a complete description of the presentation of the document, including the text, fonts, graphics, and other information needed to display it.

  8. Flat-file database - Wikipedia

    en.wikipedia.org/wiki/Flat-file_database

    A flat-file database is a database stored in a file called a flat file. Records follow a uniform format, and there are no structures for indexing or recognizing relationships between records. The file is simple. A flat file can be a plain text file (e.g. csv, txt or tsv), or a binary file. Relationships can be inferred from the data in the ...

  9. Record-oriented filesystem - Wikipedia

    en.wikipedia.org/wiki/Record-oriented_filesystem

    An alternative to a Record-oriented file is a stream file, in which the file system treats a file as an unstructured sequence of bytes. The applications may, but need not, impose a record structure. This approach significantly reduces the size and complexity of the library and reduces the number of utilities required to maintain files.