Automatic store will appear

Gregory Benford : science fiction author and astrophysicist
Foods and other items will be carried to the cashier not by the customer but by a conveyor belt in this “assembly line” grocery store. The customer is given with a roll of tape which is punched with holes when she inserts a key in a slot next to the item selected. When she finishes shopping, she hands the tape to a clerk who operates a combination “translator” and adding machine. This instrument interprets the punched holes just as a piano player plays from a music roll. Electrical impulses race to gravity chutes and release guards that drop unbreakable articles to the conveyor belt. More delicate merchandise is lowered to the moving belt by a tripper shelf, so all types of supplies—even eggs—may be handled by this system

GREGORY BENFORD, Popular Mechanics, (2012), "The Future That Never Was: Pictures from the Past', [online], Available: