P ro d ucts ■ Transitions in operating power consumption by leading models: Handycam ■ Transitions in operating power consumption by leading models: MD Walkman ■ Transitions in product weight by leading model mass: TV ( ■ Transitions in product weight by leading model mass: MD Walkman ■ Transitions in Sony’s cost of polystyrene foam/total manufacturing volume in Japan ■ Transitions in volumes of lead solder used in leading models: Handycam 3.