The document on occupational clusters was developed from papers presented in staff seminars in the Bureau of Occupational and Adult Education and contains eight papers: Introduction to the World of Clustering, Sidney C. High; Cluster Curriculum Development, Elizabeth J. Simpson; the Cluster Concept, Development of Curricular Materials for the Public Service Occupations Cluster, Patrick J. Weagraff; Occupational Career Clusters--the Oregon Way, Leonard Kunzman; Occupational Clusters and Secondary to Postsecondary Articulation, Beryl McKinnerney; International Perspectives on Clustering, Gordon I. Swanson; the Manpower Education Effort in Clustering, Ann Donovan; and Career Education--Career Clusters--Explanations, Concepts and Office of Education Occupational Education Codes, Sherrill D. McMillen. The document includes the following appended materials: a 71-item "Introduction to Clustering" reference list; related charts, models, and tables; and an 18-page career cluster taxonomy. (JR)