Dewey Decimal Classification (1876 – 1885)

In 1876 librarian Melvil Dewey published anonymously from Amherst, Massachusetts Classification and Subject Index for Cataloguing and Arranging the Books and Pamphlets of a Library. This became known as the Dewey Decimal Classification.  In 1885 Dewey published the second edition of his classification system, identifying himself as author for the first time. The Dewey Decimal Classification became the world's most widely used library classification system.