In addition to the staff units and four districts, the ministry includes ministerial and affiliated units as well. These units are responsible for various aspects of industry, trade and employment in Israel. The ministerial and affiliated units include the Investments Center, Small and Medium Enterprises Agency, Responsible Standardization Unit, Environment and Sustainable Development Administration, Cooperative Society Unit, Supervisor of Weights, Measurements and Standards, the National Physics Laboratory, the National Laboratory Accreditation Authority, and other units responsible for employment-related activities including: the Employment Relations Unit, Regulations and Labor Law Enforcement Administration, Commission for Equal Opportunities at the Workplace, and the Public and Private Daycare Division.