Forecasts of the opportunities and requirements that will face the American labor force are presented and discussed. The emphasis is on exploring the distribution of skills, temperaments and other individual characteristics of the labor force in 1960 and to systematically, as contrasted to subjectively and impressionistically, forecast their distribution for 1975. Two primary sources of data are analyzed: (1) a draft version of Tomorrow's Manpower Needs, a publication of the Bureau of Labor Statistics; and (2) a magnetic tape containing information (for 13,755 occupational titles) about aptitudes, physical demands, and working conditions associated with these occupations. How this information was treated, and why, comprise part of the content. (TL)