The definition of "industry" in Section 2(j) of the Industrial Disputes Act, 1947, is extremely broad and has been interpreted expansively by the Supreme Court, most notably in the case of Bangalore Water Supply & Sewerage Board v. A. Rajappa. The statutory definition itself is in two parts: it means "any business, trade, undertaking, manufacture or calling of employers" (covering points i and ii) and "includes any calling, service, employment, handicraft, or industrial occupation or avocation of workmen" (covering points iii and iv). Therefore, all the listed activities are part of the comprehensive definition.