As the fourth in a series of reports on a longitudinal study of over 7,000 students who entered 15 California community colleges in Fall 1978, this eight-chapter report profiles the students as of Spring 1980 in terms of: (1) demography, academic progress, and employment status; and (2) their distribution among 18 "prototypes," defined by the types of courses taken, student aspirations, enrollment patterns, and records of achievement. Chapter I details data collection procedures, including the procedures for "warehousing" and "prototyping" students, and overall study objectives. Chapter II profiles the students in terms of sex, age, ethnicity, enrollment patterns, units completed, educational objectives, types of jobs held, and wages received. In addition, Chapter II summarizes academic data specific to transfer, vocational, and special interest student groups. Chapter III defines the narrower "prototypes" falling under these three groupings and examines the distribution of students among these categories as a means of looking at college functions in light of students' aspirations, enrollment patterns, and achievement. Chapters IV, V, and VI present data for White, Black, Hispanic, and Asian students; financially disabled students; and educationally disadvantaged students. Chapter VII discusses problems faced by special categories of students, such as displaced homemakers and minorities. Summary conclusions are presented in Chapter VIII. (JP)