A salute to the tools and toys that have stood the test of time--from the Zippo lighter to the Palm Pilot, the 21st century's first great gadget. As we focus on the technology behind familiar gadgets, we see the subtle ways they have changed our lives. Other items include the flashlight, transistor radio, safety razor, and the metronome. We also go behind the scenes at Herbst-Lazar-Bell, a cutting-edge industrial design firm, and Gadget Universe, a fledgling retailer trying to topple the Sharper Image.