ABF Freight System knows the ABCs of freight transportation. The primary subsidiary of Arkansas Best, ABF Freight System specializes in national and regional long-haul, less-than-truckload (LTL) transportation of general commodities such as apparel, appliances, chemicals, food, furniture, plastics, rubber, and textiles. (LTL carriers combine freight from multiple shippers into a single truckload.) ABF Freight System operates from a network of about 280 terminals throughout the US and Canada and in Puerto Rico. It maintains a fleet of some 4,000 tractors and 17,000 trailers. The company, which traces its origins to 1923, offers service in Mexico through arrangements with Mexican carriers.