This publication is the first of four volumes of "Tomorrow's Manpower Needs," publications devoted to the subject of national, state, and area projections of manpower requirements. The objective of this publication is to provide projections of probable need in particular occupations as guides for education, training, and other policies aimed at meeting manpower needs. The bulletin reflects the continuing program of manpower research conducted by the Bureau of Labor Statistics. Consequently, the projections of industry and occupational employment requirements supercede those published in previous Bureau reports. Topics covered include: (1) Using National Manpower Data to Develop State and Area Manpower Requirements Projections, (2) Estimating Replacement Needs, and (3) Appraising the Adequacy of Supply in Individual Occupations. The companion publications are available as VT 008 728-VT 008 730. (CH)