BRADFORD W. PARKINSON KNEW THAT A GLOBAL POSITIONING SYSTEM WOULD CHANGE THE WORLD, BUT THE OBSTACLES HE FACED WEREN’T ALL TECHNOLOGICAL
SAMUEL COLT’S REVOLVER CHANGED THE WORLD OF GUNS—AND THE REST OF THE WORLD TOO
FIFTY YEARS AGO A TRANSISTOR RADIO CALLED THE TR1 STARTED THE REMAKING OF THE WORLD BY SEMICONDUCTORS
THE INNOVATORS WHO MADE DIGGING TUNNELS HIGH-TECH
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