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A PDF file is organized using ASCII characters, except for certain elements that may have binary content. The file starts with a header containing a magic number (as a readable string) and the version of the format, for example %PDF-1.7. The format is a subset of a COS ("Carousel" Object Structure) format. [24]
Documents containing Adobe extended features still carry the PDF base version number 1.7 but also contain an indication of which extension was followed during document creation. [21] PDF documents conforming to ISO 32000-2 carry the PDF version number 2.0, and are known to developers as "PDF 2.0 documents".
Plucker is a free and open-source mobile and desktop e-book reader application with its own associated file format and software to automatically generate Plucker files from text, PDF, HTML, or other document format files, web sites or RSS feeds. The format is public and well-documented.
Foxit PDF Reader (formerly Foxit Reader) is a multilingual freemium PDF (Portable Document Format) tool that can create, view, edit, digitally sign, and print PDF files. [3] Foxit Reader is developed by Fuzhou, China-based Foxit Software. Early versions of Foxit Reader were notable for startup performance and small file size. [4]
Acrobat Reader is the freeware version of Acrobat developed by Adobe to view, create, fill, print and format files in a PDF. It is currently available for Windows, macOS, iOS, and Android. Acrobat Standard is the standard full version of Acrobat developed by Adobe to edit, create, manipulate, print and manage files in a PDF.
Authors must remain true to their calling, unimpeded by those who may wish to impose limits on their imagination, writes Queen Camilla
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 ...
Google Play Books, formerly Google eBooks, is an ebook digital distribution service operated by Google, part of its Google Play product line. Users can purchase and download ebooks and audiobooks from Google Play, which offers over five million titles, with Google claiming it to be the "largest ebooks collection in the world".