Rank-and-file members, as well as representatives, of the United Steelworkers refer to themselves, and are most often referred to, as Steelworkers. The use of the capitalized single word "Steelworker" or "Steelworkers", as opposed to the lowercase two-worded "steel worker" or "steel workers", is also an identifier of those who are part of, or affiliated with, the United Steelworkers International Union rather than being general non-union workers within the steel industry. This distinction is important in North America wherein a vast majority of the steel industry is unionized. For example, some of the most recognizable and largest companies in the business such as United States Steel (USS), Servestal, and the largest steel company in the world, ArcelorMittal, with their combined hourly workforces at facilities in North America being Steelworkers and represented by the USW, including the largest facilities on the continent, like US Steel's Gary Works in Gary, Indiana, ArcelorMittal's Burns Harbor in Burns Harbor, Indiana, Indiana Harbor East and West in Northwest Indiana, and Cleveland Plant in Cleveland, Ohio, all of which are situated on the Great Lakes freshwater system. On the other hand, only a handful of smaller companies, usually at facilities known as "mini-mills", like Nucor Steel and its facility in Crawfordsville, Indiana, are non-union shops not represented by the United Steelworkers.