The Dewey Decimal System has been used to classify books in libraries for 140 years.
Its inventor, Melvil Dewey, was so obsessed with efficiency he had specific pockets for different times of the day.
Shaun Wallace visits his local library to see how the system works and wonders whether the advent of the internet search is jeopardising something precious.
Shaun Wallace investigates Melvil Dewey's book organisation system at his local library, and the likely impact of the internet.
Shaun Wallace visits his local library to see how the Dewey Decimal System works.