Contents: M.W. Riley, Aging, Health, and Social Change: An Overview. G.L. Maddox, Psychosocial Perspectives on Aging. K.W. Schaie, Aging and Human Performance. D. Arenberg, A Note on Differences and Changes in Memory with Age. R.F. Thompson, D.S. Woodruff-Pak, A Model System Approach to Aging and the Neuronal Bases of Learning and Memory. C.E. Finch, Environmental Influences on the Brain During Aging. N.S. Braverman, Immunity and Aging: Immunologic and Behavioral Perspectives. M. Stein, S.J. Schleifer, S.E. Keller, Immunity and Aging: Experimental and Clinical Studies. E.L. Schneider, Interventions and Aging: A Note on Biomedical Perspectives. J. Rodin, C. Cashman, L. Desiderato, Interventions and Aging: Enrichment and Prevention.