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Portable Document Format (PDF) is a file format developed by Adobe in 1993 to present documents, including text formatting and images, in a manner independent of application software, hardware, and operating systems. Based on the PostScript language, each PDF file encapsulates a complete description of a fixed-layout flat document, including the text, fonts, vector graphics, raster images and other information needed to display it. PDF files may contain a variety of content besides flat text and graphics including logical structuring elements, interactive elements such as annotations and form-fields, layers, rich media (including video content), and three-dimensional objects using U3D or PRC, and various other data formats. The PDF specification also provides for encryption and digital signatures, file attachments, and metadata to enable workflows requiring these features.
EPUB is an e-book file format that uses the ".epub" file extension. The term is short for electronic publication and is sometimes styled 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 Forum (IDPF). It became an official standard of the IDPF in September 2007, superseding the older Open eBook standard. The Book Industry Study Group endorses EPUB 3 as the format of choice for packaging content and has stated that the global book publishing industry should rally around a single standard. The EPUB format is implemented as an archive file consisting of XHTML files carrying the content, along with images and other supporting files. EPUB is the most widely supported vendor-independent XML-based (as opposed to PDF) e-book format; that is, it is supported by almost all hardware readers, except for Kindle.
Science Books, Biology Books, Chemistry Books, Physics Books, Technology Books, Research Books, Engineering Books, Nature Books, Education Books, Space Books, Scientist Books, Facts Books, Nasa Books, Stem Books, Astronomy Books, Universe Books, Medicine Books, Knowledge Books, Maths Books, Earth Books, Laboratory Books, Cosmos Books, Microbiology Books, Astrophysics Books, Innovation Books, School Books, Science Facts Books, Student Books, Biotechnology Books and many more.
Drawings Books, Sketches Books, Illustrations Books, Oil Paintings Books, Acrylic Paintings Books, Watercolor Paintings Books, Digital Art Books, Photography Books, Artaccount Books, Artwork Books, Arts Help Books, Art Curator Books, Art Collector Books, Artistic Books, Cool Art Books, Visual Art Books, Art Love Books, Inspiration Books, Artist Life Books, Home Decor Books, Traditional Art Books, Arts Gallery Books, Art Help Books, Design Books, New Art Books, New Artwork Books, Arts Society Books, World Of Artists Books and many more.