Tim Harford tells the fascinating stories of inventions, ideas and innovations which have helped create the economic world.
http://www.bbc.co.uk/programmes/p04b1g3c
Hollerith punch card
Data is a hugely profitable commodity - if you know how to process it. Tim Harford tells the story of Herman Hollerith, and how his 19th-century machine for processing census data laid the foundations for some of the world's most valuable companies.