Encyclopædia Britannica

Encyclopædia Britannica is an encyclopedia published since 1789 that has been the leading source of general reference information for the 20th century. It was first published in Edinburgh in 1768, but is now published in other cities, such as Chicago and New Delhi. It became popular as it provided more in-depth coverage of the big picture of various subjects in addition to articles regarding more specific topics such as certain people. It was published in edition after edition until 2012, when it announced that it would only exist online.