Smith Corona is a US manufacturer of thermal labels, direct thermal labels, and thermal ribbons used in warehouses for primarily barcode labels. Once a large U.S. typewriter and mechanical calculator manufacturer, it expanded aggressively during the 1960s to become a broad-based industrial conglomerate whose products extended to paints, foods, and paper. The mechanical calculator sector was wiped out in the early 1970s by the production of cheap electronic calculators, and the typewriter business collapsed in the mid-1980s due to the introduction of PC-based word processing.