Setting the scene
Otto Frederick Rohwedder, a Missouri jeweler turned inventor, spent years perfecting a machine that sliced loaves without crumbling them; bakeries resisted until Wonder Bread's parent company saw marketing potential in uniform slices for toasters and sandwiches.
What happened
Commercial sliced bread was first sold on July 7, 1928, at the Chillicothe Baking Company's Frank Bench store in Chillicothe, Missouri, using Rohwedder's automatic bread slicer.
Why it still matters
The phrase 'greatest thing since sliced bread' followed as Wonder Bread nationalized the innovation; sliced bread was briefly banned during World War II rationing of wax paper, provoking public outcry that revealed how thoroughly Americans depended on convenience.
Background
The phrase greatest thing since sliced bread followed.