How 4,000 Men Hand-Deliver 175,000 Lunches Around Mumbai in 1 Day

"In an age of multinational food chains, demand for the 125-year-old dabbawalla delivery system is at an all-time high. The dabbawallas rely on a series of codes written on the sides of the boxes that function as directions. Though many of them are illiterate, they have learned to sign their names on the receipt. In fact, the delivery service is estimated to have an error rate of 1 in every 16 million transactions, and has been studied by corporations like GE for its precision and accuracy."