Dr. Zavares tightened the final screw on his invention. He tossed the wrench on the workbench with a thud. The beakers in the center of the room bubbled with activity. "Computer," he announced to the empty room, "Zavares needs a lemonade." A beeping and grinding noise could be heard in the distance and then a small robot floated into the laboratory with a glass of lemonade on a platter. Dr. Zavares grabbed the lemonade from off of the platter and drank it. He then returned the glass to the floating platter and the robot hovered away. "Well, here goes nothing," Dr. Zavares said to himself as he reached for the power switch on his latest invention.