What's the difference between i.e. and e.g.?
a system of classifying library materials with numerals and decimals
for Melvil Dewey, US librarian
proposed 1876 by Melvil Dewey (1851-1931) while acting librarian of Amherst College. He also crusaded for simplified spelling and the metric system.
A system used in libraries for the classification of books and other publications. It uses the numbers 000 to 999 to cover the general fields of knowledge and subdivides each field by the use of decimals and letters. Named after its inventor, Melvil Dewey.