via NationalDayCalendar: Dewey Decimal System Day is observed annually on December 10. December 10, 1851, is the birthday of Melvil Dewey (1851-1931) inventor of the Dewey Decimal system of library classification. As the most widely used library classification system, the Dewey Decimal Classification (DDC) or Dewey Decimal System has been in use since 1876 when American […]
