Developed by an American trucker, Malcolm McLean, who had one of the largest truck transportation businesses in the U.S. in the 1940s and 50s, shipping containers transformed the international transport industry. While McLean’s original containers were standardized in terms of size (all 35-foot), extremely robust, stackable, and lockable, they were relatively basic. However, the industry progressed rapidly, and in 1968, the first International Organization for Standardization (ISO) standards were introduced. These standards outlined the terminology, dimensions, and ratings of freight containers, as well as how they should be identified.