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  2. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    The standard security provided by PDF consists of two different methods and two different passwords: a user password, which encrypts the file and prevents opening, and an owner password, which specifies operations that should be restricted even when the document is decrypted, which can include modifying, printing, or copying text and graphics ...

  3. List of document markup languages - Wikipedia

    en.wikipedia.org/wiki/List_of_document_markup...

    ABC notation - markup language for music scores in pure text. [3] Amigaguide – The Amiga hypertext documentation format, including multimedia support. AsciiDoc - plaintext markup language similar to Markdown; AsciiDoctor - plaintext markup language (extending AsciiDoc) AsciiDoctor; Chemical Markup Language (CML)

  4. List of file formats - Wikipedia

    en.wikipedia.org/wiki/List_of_file_formats

    While MS-DOS and NT always treat the suffix after the last period in a file's name as its extension, in UNIX-like systems, the final period does not necessarily mean that the text after the last period is the file's extension. [1] Some file formats, such as .txt or .text, may be listed multiple times.

  5. Human-readable medium and data - Wikipedia

    en.wikipedia.org/wiki/Human-readable_medium_and_data

    It is often encoded as ASCII or Unicode text, rather than as binary data. In most contexts, the alternative to a human-readable representation is a machine-readable format or medium of data primarily designed for reading by electronic, mechanical or optical devices, or computers.

  6. Machine-readable medium and data - Wikipedia

    en.wikipedia.org/wiki/Machine-readable_medium...

    Machine-readable data must be structured data. [1]Attempts to create machine-readable data occurred as early as the 1960s. At the same time that seminal developments in machine-reading and natural-language processing were releasing (like Weizenbaum's ELIZA), people were anticipating the success of machine-readable functionality and attempting to create machine-readable documents.

  7. Markup language - Wikipedia

    en.wikipedia.org/wiki/Markup_language

    The codes h1, p, and em are examples of semantic markup, in that they describe the intended purpose or the meaning of the text they include. Specifically, h1 means "this is a first-level heading", p means "this is a paragraph", and em means "this is an emphasized word or phrase". A program interpreting such structural markup may apply its own ...

  8. Comparison of e-book formats - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_e-book_formats

    The plain text format doesn't support DRM or formatting options (such as different fonts, graphics or colors). It has excellent portability as it is the simplest e-book encoding possible; a plain text file contains only ASCII or Unicode text (text files with UTF-8 or UTF-16 encoding are also popular for languages other than English). Almost all ...

  9. List of markup languages - Wikipedia

    en.wikipedia.org/wiki/List_of_markup_languages

    List of document markup languages—This term is often used synonymously with "markup language", presumably because document can refer to any written or recorded representation. List of XML markup languages -- XML itself is properly a meta-language used to define other markup languages.