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2. PDF - Wikipedia

   en.wikipedia.org/wiki/PDF

   Portable Document Format (PDF), standardized as ISO 32000, is a file format developed by Adobe in 1992 to present documents, including text formatting and images, in a manner independent of application software, hardware, and operating systems. [ 2 ][ 3 ] Based on the PostScript language, each PDF file encapsulates a complete description of a fixed-layout flat document, including the text ...

3. History of PDF - Wikipedia

   en.wikipedia.org/wiki/History_of_PDF

   History of PDF. The Portable Document Format (PDF) was created by Adobe Systems, introduced at the Windows and OS/2 Conference in January 1993 and remained a proprietary format until it was released as an open standard in 2008. Since then, it has been under the control of an International Organization for Standardization (ISO) committee of ...

4. PDF/A - Wikipedia

   en.wikipedia.org/wiki/PDF/A

   PDF/A is an ISO -standardized version of the Portable Document Format (PDF) specialized for use in the archiving and long-term preservation of electronic documents. PDF/A differs from PDF by prohibiting features unsuitable for long-term archiving, such as font linking (as opposed to font embedding) and encryption. [1] The ISO requirements for PDF/A file viewers include color management ...

5. 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 another, as well as to create, edit and publish e-books.

6. PDF/UA - Wikipedia

   en.wikipedia.org/wiki/PDF/UA

   PDF/UA is not a separate file-format but simply a way to use the familiar PDF format invented by Adobe Systems and now standardized as ISO 32000. [5] In general PDF/UA requires Tagged PDF (ISO 32000-1, 14.8), but adds a variety of qualitative requirements, especially regarding semantic correctness of the tags employed: [6][7] PDF/UA complements WCAG 2.0, [8] and should be used to make PDF ...

7. EPUB - Wikipedia

   en.wikipedia.org/wiki/EPUB

   EPUB is an e-book file format that uses the ".epub" file extension. The term is short for electronic publication and is sometimes stylized as ePUB. EPUB is supported by many e-readers, and compatible software is available for most smartphones, tablets, and computers. EPUB is a technical standard published by the International Digital Publishing ...