|Producer||University of Pennsylvania (United States)|
|History||1993 to present|
|No. of records||Over 2 million|
|Title list(s)|| onlinebooks|
The Online Books Page is an index of e-text books available on the Internet.  It is edited by John Mark Ockerbloom and is hosted by the library of the University of Pennsylvania.  The Online Books Page lists over 2 million books  and has several features, such as A Celebration of Women Writers and Banned Books Online.
The Online Books Page was the second substantial effort to catalog online texts, but the first to do so with the rigors required by library science. It first appeared on the Web in the summer of 1993. The Internet Public Library came shortly thereafter.
The web site was named one of the best free reference web sites in 2003 by the Machine-Assisted Reference Section of the American Library Association. 
An encyclopedia, encyclopædia, or encyclopaedia is a reference work or compendium providing summaries of knowledge either general or special to a particular field or discipline. Encyclopedias are divided into articles or entries that are arranged alphabetically by article name or by thematic categories, or else are hyperlinked and searchable by random access. Encyclopedia entries are longer and more detailed than those in most dictionaries. Generally speaking, encyclopedia articles focus on factual information concerning the subject named in the article's title; this is unlike dictionary entries, which focus on linguistic information about words, such as their etymology, meaning, pronunciation, use, and grammatical forms.
Project Gutenberg (PG) is a volunteer effort to digitize and archive cultural works, as well as to "encourage the creation and distribution of eBooks." It was founded in 1971 by American writer Michael S. Hart and is the oldest digital library. Most of the items in its collection are the full texts of books or individual stories in the public domain. All files can be accessed for free under an open format layout, available on almost any computer. As of 3 October 2015, Project Gutenberg had reached 50,000 items in its collection of free eBooks.
The Internet Archive is an American digital library with the stated mission of "universal access to all knowledge". It provides free public access to collections of digitized materials, including websites, software applications/games, music, movies/videos, moving images, and millions of books. In addition to its archiving function, the Archive is an activist organization, advocating a free and open Internet. As of May 7, 2022, the Internet Archive holds over 35 million books and texts, 7.9 million movies, videos and TV shows, 842 thousand software programs, 14 million audio files, 4 million images, 2.4 million TV clips, 237 thousand concerts, and over 682 billion web pages in the Wayback Machine.
Electronic publishing includes the digital publication of e-books, digital magazines, and the development of digital libraries and catalogues. It also includes the editing of books, journals and magazines to be posted on a screen.
The Million Book Project was a book digitization project led by Carnegie Mellon University School of Computer Science and University Libraries from 2007–2008. Working with government and research partners in India and China, the project scanned books in many languages, using OCR to enable full text searching, and providing free-to-read access to the books on the web. As of 2007, they have completed the scanning of 1 million books and have made the entire catalog accessible online.
JSTOR is a digital library founded in 1995 in New York City. Originally containing digitized back issues of academic journals, it now encompasses books and other primary sources as well as current issues of journals in the humanities and social sciences. It provides full-text searches of almost 2,000 journals.
An online encyclopedia, also called an Internet encyclopedia, or a digital encyclopedia, is an encyclopedia accessible through the internet. Examples include Wikipedia and Encyclopaedia Britannica.
Wikibooks is a wiki-based Wikimedia project hosted by the Wikimedia Foundation for the creation of free content digital textbooks and annotated texts that anyone can edit.
Wikisource is an online digital library of free-content textual sources on a wiki, operated by the Wikimedia Foundation. Wikisource is the name of the project as a whole and the name for each instance of that project ; multiple Wikisources make up the overall project of Wikisource. The project's aim is to host all forms of free text, in many languages, and translations. Originally conceived as an archive to store useful or important historical texts, it has expanded to become a general-content library. The project officially began on November 24, 2003 under the name Project Sourceberg, a play on the famous Project Gutenberg. The name Wikisource was adopted later that year and it received its own domain name.
The Entrez Global Query Cross-Database Search System is a federated search engine, or web portal that allows users to search many discrete health sciences databases at the National Center for Biotechnology Information (NCBI) website. The NCBI is a part of the National Library of Medicine (NLM), which is itself a department of the National Institutes of Health (NIH), which in turn is a part of the United States Department of Health and Human Services. The name "Entrez" was chosen to reflect the spirit of welcoming the public to search the content available from the NLM.
DjVu is a computer file format designed primarily to store scanned documents, especially those containing a combination of text, line drawings, indexed color images, and photographs. It uses technologies such as image layer separation of text and background/images, progressive loading, arithmetic coding, and lossy compression for bitonal (monochrome) images. This allows high-quality, readable images to be stored in a minimum of space, so that they can be made available on the web.
Open Library is an online project intended to create "one web page for every book ever published". Created by Aaron Swartz, Brewster Kahle, Alexis Rossi, Anand Chitipothu, and Rebecca Malamud, Open Library is a project of the Internet Archive, a nonprofit organization. It has been funded in part by grants from the California State Library and the Kahle/Austin Foundation. Open Library provides online digital copies in multiple formats, created from images of many public domain, out-of-print, and in-print books.
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. Books are provided either by publishers and authors through the Google Books Partner Program, or by Google's library partners through the Library Project. Additionally, Google has partnered with a number of magazine publishers to digitize their archives.
The Internet Sacred Text Archive (ISTA) is a Santa Cruz, California-based website dedicated to the preservation of electronic public domain religious texts.
A digital library, also called an online library, an internet library, a digital repository, or a digital collection is an online database of digital objects that can include text, still images, audio, video, digital documents, or other digital media formats or a library accessible through the internet. Objects can consist of digitized content like print or photographs, as well as originally produced digital content like word processor files or social media posts. In addition to storing content, digital libraries provide means for organizing, searching, and retrieving the content contained in the collection. Digital libraries can vary immensely in size and scope, and can be maintained by individuals or organizations. The digital content may be stored locally, or accessed remotely via computer networks. These information retrieval systems are able to exchange information with each other through interoperability and sustainability.
An ebook, also known as an e-book or eBook, is a book publication made available in digital form, consisting of text, images, or both, readable on the flat-panel display of computers or other electronic devices. Although sometimes defined as "an electronic version of a printed book", some e-books exist without a printed equivalent. E-books can be read on dedicated e-reader devices, but also on any computer device that features a controllable viewing screen, including desktop computers, laptops, tablets and smartphones.
Trove is an Australian online library database aggregator and service which includes full text documents, digital images, bibliographic and holdings data of items which are not available digitally, and a free faceted-search engine as a discovery tool. The database includes archives, images, newspapers, official documents, archived websites, manuscripts and other types of data. Hosted by the National Library of Australia in partnership with content providers, including members of the National and State Libraries Australia, it is one of the most well-respected and accessed GLAM services in Australia, with over 70,000 daily users.
BlackPast.org is a web-based reference center that is dedicated primarily to the understanding of African-American history and the history of people of African ancestry. In 2011 the American Library Association's Reference and User Services Association included it in its list of the 25 Best Free Reference Websites of the Year. According to BlackPast.org, the website has a global audience of about two million visitors per year from over 100 nations. In 2009, Canada, Australia, Great Britain, Brazil, and Germany ranked as the top five countries in visitors to the site after the United States. A 2008 website review described it as easily navigable and well organized but also as containing omissions among some features and as a work in progress. By 2009, the organization was selected by New York Public Library reference librarians as one of the top 25 hybrid print and electronic resources for the year.
The Chinese Text Project is a digital library project that assembles collections of early Chinese texts. The name of the project in Chinese literally means "The Chinese Philosophical Book Digitization Project", showing its focus on books related to Chinese philosophy. It aims at providing accessible and accurate versions of a wide range of texts, particularly those relating to Chinese philosophy, and the site is credited with providing one of the most comprehensive and accurate collections of classical Chinese texts on the Internet, as well as being one of the most useful textual databases for scholars of early Chinese texts.
Wikipedia is a free, web-based, collaborative and multilingual encyclopedia website and project supported by the non-profit Wikimedia Foundation. It has more than 48 million articles written collaboratively by volunteers around the world. Almost all of its articles can be edited by anyone with access to the site, and it has about 100,000 regularly active contributors.