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2. PDF - Wikipedia

   en.wikipedia.org/wiki/PDF

   A PDF file is often a combination of vector graphics, text, and bitmap graphics. The basic types of content in a PDF are: Typeset text stored as content streams (i.e., not encoded in plain text ); Vector graphics for illustrations and designs that consist of shapes and lines;

3. PDF/A - Wikipedia

   en.wikipedia.org/wiki/PDF/A

   PDF is a standard for encoding documents in an "as printed" form that is portable between systems. However, the suitability of a PDF file for archival preservation depends on options chosen when the PDF is created: most notably, whether to embed the necessary fonts for rendering the document; whether to use encryption; and whether to preserve additional information from the original document ...

4. Comparison of e-book formats - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_e-book_formats

   The following is a comparison of e-book formats used to create and publish e-books . The EPUB format is the most widely supported e-book format, supported by most e-book readers except Amazon Kindle [ a] devices. Most e-book readers also support the PDF and plain text formats. E-book software can be used to convert e-books from one format to ...

5. List of file formats - Wikipedia

   en.wikipedia.org/wiki/List_of_file_formats

   XMC – Assisted contact lists format, based on XML and used in kindergartens and schools; ZED – My Heritage Family Tree; zone – Zone file a text file containing a DNS zone; FX – Microsoft DirectX plain text effects and properties for the associated file and are used to specify the textures, shading, rendering, lighting and other 3D ...

6. History of PDF - Wikipedia

   en.wikipedia.org/wiki/History_of_PDF

   JPEG 2000; enhanced support for embedding and playback of multimedia; object streams; cross reference streams; XML Forms Data Format (XFDF) for interactive form submission (replaced the XML format in PDF 1.4); support for forms, rich text elements and attributes based on Adobe's XML Forms Architecture (XFA) 2.02 (which defines only static XFA ...

7. Text file - Wikipedia

   en.wikipedia.org/wiki/Text_file

   A text file (sometimes spelled textfile; an old alternative name is flatfile) is a kind of computer file that is structured as a sequence of lines of electronic text. A text file exists stored as data within a computer file system. In operating systems such as CP/M, where the operating system does not keep track of the file size in bytes, the ...