This U.S. industry comprises establishments primarily engaged in manufacturing mayonnaise, salad dressing, vinegar, mustard, horseradish, soy sauce, tarter sauce, Worcestershire sauce, and other prepared sauces (except tomato-based and gravy). Cross-References. Establishments primarily engaged in-- ? Manufacturing catsup and similar tomato-based sauces--are classified in U.S. Industry 311421, Fruit and Vegetable Canning; ? Manufacturing dry salad dressing and dry sauce mixes--are classified in U.S. Industry 311942, Spice and Extract Manufacturing; and ? Manufacturing gravies--are classified in U.S. Industry 311999, All Other Miscellaneous Food Manufacturing.