DEL MAR, Calif. — Dick Tracy got an atom-powered two-way wrist radio in 1946. Marty Cooper never forgot it. The Chicago boy became a star engineer who ran Motorola’s research and development arm when ...

Sometimes the true measure of a technology’s impact is not how quickly it spreads but how long it takes for the backlash to set in. No sooner had cell phones with built-in digital cameras caught on in ...