This U.S. industry comprises establishments primarily engaged in converting paper rollstock or paperboard into die-cut paper or paperboard office supplies. For the purpose of this industry, office supplies are defined as office products, such as filing folders, index cards, rolls for adding machines, file separators and dividers, tabulating cards, and other paper and paperboard office supplies. Cross-References. Establishments primarily engaged in-- ? Manufacturing die-cut paper and paperboard products (except office supplies)--are classified in U.S. Industry 322299, All Other Converted Paper Product Manufacturing; and ? Manufacturing paper and paperboard products used for writing and similar applications (e.g., looseleaf fillers, notebooks, pads, stationery, tablets)--are classified in U.S. Industry 322233, Stationery, Tablet, and Related Product Manufacturing.