Steven Sasson, Eric Fossum, Joseph Woodland, Bernard Silver.

FORBES: You've Never Heard of Them, but They've Changed Your Life

Joseph Woodland and Bernard Silver developed the very first bar code scanning system, in the late 1940s, after Woodland heard a food chain executive say he wished he had a way to capture product information at checkout.

FORBES: You've Never Heard of Them, but They've Changed Your Life

Ethiopia's world indoor champion Deresse Mekonnen claimed a surprise silver with defending champion Bernard Lagat, also Kenyan-born but now competing for the United States, in bronze.

CNN: Women's world champion Semenya faces gender test

Bernard, the 2006 Commonwealth silver medallist, passed at the opportunity to jump 2.19m, going straight to 2.23 and, after three attempts, he cleared the height.

BBC: Phillips Idowu wins European Athletics triple jump gold

Martyn Bernard of England will be hoping to improve on the silver medal he won at the 2006 games in the high jump .

BBC: Sport - Commonwealth Games 2010: Form guide - men's field athletics