Sulfur oxides are among the most common and most injurious of the pollutants that contaminate the Nation's air and threaten public health and welfare. The Department of Health, Education, and Welfare has underway a large-scale research and development program focused on technology for dealing with the sulfur oxides problem. This document was prepared for use in the planning and programming of sulfur oxides research and development effort and as an aid to coordination of the work of the various organizations involved in this effort. The programs are: Flue gas treatment; Stack meteorology; Fuel desulfurization; Fuel conversion; New combustion processes; Industrial process control; Fuel availability surveys; Supporting instrumentation development; and Program development, analysis, and evaluation.