Encyclopedia Britannica ( Encyclopedia Britannica; also known as: "Encyclopedia Britannica") is the most academic, authoritative and famous encyclopedia today, commonly known in the English-speaking world as "one of the ABC encyclopedias", and one of the three major encyclopedias in the world (the other two are the Encyclopedia Americana and the Encyclopedia Collegium). The Encyclopedia Britannica is a private encyclopedia published by the private sector.) The Encyclopedia Britannica was published in Edinburgh, Scotland in 1771 by the private sector Encyclopedia Britannica Press, and was copyrighted by the University of Chicago in 1941. The website is its online version.