This report is the 11th in a series of interim reports stemming from the U.S. Metric Study, which is being conducted by the National Bureau of Standards in accordance with the Metric Study Act of 1968 (Public Law 90-472). Although it mainly concerns the relationships of measurement units to engineering standards, the issue of international standards is also discussed. Findings indicate that engineering standards can be harmonized internationally without the U.S. changing its measurement units. The International System of Units (SI) will become the measurement units in international standards, which means many U.S. engineering practices will have to change. However, the impact and the extent of change can be minimized, depending on the degree of participation in the international forum and the specific engineering practice. Extensive resource materials are appended. (AG)