Means of laborThe means of labor (also called instruments of labor) is a concept in Marxist political economy that refers to "all those things with the aid of which man acts upon the subject of his labor, and transforms it." (Institute of Economics of the Academy of Sciences of the U.S.S.R., 1957) Means of labor include tools, machinery, buildings and land used for production, and infrastructure such as roads, telecommunications networks, and so forth. Labor, itself, defines "work, especially hard physical work.