The unemployment rate is lower for scientists and engineers than for the general population. Variations across racial and ethnic groups in the reasons for not working or for working part time reflect differing age distributions of men and women in the science and engineering (S&E) workforce, as well as differing family responsibilities. Rates of unemployment also vary by disability status. Disability can occur throughout one's life. Disabilities acquired at birth or at an early age may influence decisions to pursue S&E studies; those acquired at later ages may influence opportunities to continue or seek employment.