Wikipedia (ⁱ/ˌwɪkɨˈpiːdiə/ or ⁱ/ˌwɪkiˈpiːdiə/ WIK-i-PEE-dee-ə) is a free, collaboratively edited and multilingual Internet encyclopedia supported by the non-profit Wikimedia Foundation. Its 22 million articles (over 0 million in English alone) have been 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. As of June 2012, there are editions of Wikipedia in 285 languages. It has become the largest and most popular general reference work on the Internet, ranking sixth globally among all websites on Alexa and having an estimated 365 million readers worldwide. It is estimated that Wikipedia receives 2.7 billion monthly pageviews from the United States alone.

Wikipedia was launched in January 2001 by Jimmy Wales and Larry Sanger. Sanger coined the name Wikipedia, which is a portmanteau of wiki (a type of collaborative website, from the Hawaiian word wiki, meaning "quick") and encyclopedia. Wikipedia's departure from the expert-driven style of encyclopedia building and the presence of a large body of unacademic content have received extensive attention in print media. In its 2006 Person of the Year article, Time magazine recognized the rapid growth of online collaboration and interaction by millions of people around the world. It cited Wikipedia as an example, in addition to YouTube, MySpace, and Facebook. Wikipedia has also been praised as a news source because of how quickly articles about recent events appear. Students have been assigned to write Wikipedia articles as an exercise in clearly and succinctly explaining difficult concepts to an uninitiated audience.

A book is a set of written, printed, illustrated, or blank sheets, made of ink, paper, parchment, or other materials, usually fastened together to hinge at one side. A single sheet within a book is called a leaf, and each side of a leaf is called a page. A book produced in electronic format is known as an electronic book (e-book).

Books may also refer to works of literature, or a main division of such a work. In library and information science, a book is called a monograph, to distinguish it from serial periodicals such as magazines, journals or newspapers. The body of all written works including books is literature. In novels and sometimes other types of books (for example, biographies), a book may be divided into several large sections, also called books (Book 1, Book 2, Book 3, and so on). A lover of books is usually referred to as a bibliophile or, more informally, a bookworm.

A store where books are bought and sold is a bookstore or bookshop. Books can also be borrowed from libraries. In 2010, Google estimated that since the invention of printing, approximately 130,000,000 unique titles had been published.

Tom Chatfield (born in 1980) is a British author, and game and technology theorist.

Chatfield took a doctorate and taught at St John's College, Oxford, and has subsequently written for publications including The Independent, The Observer, The Times Literary Supplement, The Sunday Times, the New Statesman, the Evening Standard, and Wired magazine.

His book on the culture of video games Fun Inc was published worldwide in 2010. He is an associate editor at Prospect magazine,, Fellow at The School of Life and guest faculty member at the Said Business School, Oxford .

A frequent speaker and consultant on games and new media, he spoke at TED Global 2010 on "7 ways games reward the brain", is a lead content designer and writer on Preloaded's game The End, and appears regularly in the British and international media as a commentator.

Italian think tank LSDP named him among its 100 top global thinkers in 2010 for his work on games.

Fun Inc was published in 2010 by Virgin Books in the UK and by Pegasus Books in the US. An investigation of the business, cultural significance and larger lessons to be learned from the video games industry, it addresses popular concerns such as the debate over violence in games, as well as the questions of games as art, as a fundamental human activity, and as an index of ongoing transformations in the social sciences, economics and 21st century life.

Thomas à Kempis (Thomas van Kempen or Thomas Hemerken or Haemerken, litt. "small hammer"); (c. 1380 – † Zwolle, 25 July 1471) was a late Medieval Catholic monk and the probable author of The Imitation of Christ, which is one of the best known Christian books on devotion. His name means, "Thomas of Kempen", his home town and in German he is known as Thomas von Kempen. He also is known by various spellings of his family name: Thomas Haemerkken; Thomas Hammerlein; Thomas Hemerken, and Thomas Hämerken.

He was born at the Lower Rhine region in Kempen, Germany, County of Cleves ca.1380. His paternal name was Hemerken, Kleverlandish for little hammer. His father John was a blacksmith and his mother, Gertrude was a school-mistress.

In 1392 he followed his brother, Jan, to Deventer, Netherlands in order to attend the city school. While attending school in Deventer, Thomas encountered the Brethren of the Common Life, followers of Gerard Groote's Modern Devotion. He attended school in Deventer from 1392 to 1399.