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PDF Drive is a search engine for PDF files. As of today we have 77,711,804 eBooks for download for free and it is increasing. No download limits.
Punjab elearn is the official repository of digitized textbooks of Punjab. Each book has been augmented with Video Lectures, Illustrations, Animations, Simulations and Interactive Assessments. Through this website, you can access 30 Science and Maths textbooks for Grade 5-12 which have been augmented with 13,047 Video Lectures, 592 Simulations , 2100 Audio minutes and 1,830Animations.
Project Gutenberg offers over 57,000 free eBooks. Choose among free epub books, free kindle books, download them or read them online. You will find the world's great literature here, with focus on older works for which copyright has expired. Thousands of volunteers digitized and diligently proofread the eBooks, for enjoyment and education.
Open textbooks are textbooks that have been funded, published, and licensed to be freely used, adapted, and distributed. These books have been reviewed by faculty from a variety of colleges and universities to assess their quality. These books can be downloaded for no cost, or printed at low cost. All textbooks are either used at multiple higher education institutions; or affiliated with an institution, scholarly society, or professional organization.
Google Books is a service from Google Inc. that searches the full text of books and magazines that Google has scanned, converted to text using optical character recognition (OCR), and stored in its digital database.
Digital Book Index provides links to more than 148,000 fulltext digital books from more than 180,000 commercial and non-commercial publishers, universities and various private sites. More than 120,000 of these books, texts, and documents are available free.
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OMICS International is an organization that amalgamates Open Access Publications and International science events for the benefit of the global scientific community. The organization was established in the year 2007 with the sole aim of providing a platform for "Open Access" to the research information pertaining to diversified fields of Science and technology. OMICS International publishes scholarly journals that can be easily accessed online without paying any subscription charges.