LaGuardia Community College (LGCC) has recently initiated work on the development of a comprehensive system for computer storage, processing, and analysis of data pertaining to student performance, demography, and attitudes. This system is not yet wholly operative, but many of its components have been developed. This report presents the findings of several computer-based analyses of student performance. Grades awarded in credit classes from fall 1971 to summer 1974 are compared for groups of students classified by curriculum, admission status (open admission or other), attendance pattern (full-time or part-time), date of admission, and number of credits accrued. Data revealing grade distributions as a function of date of award, time of year, and awarding division are also presented. The findings show a marked differentiation in performance associated with admission status, credit-accrual, and curriculum classifications. Factors which may account for the obtained heterogeneity of student performance are suggested and discussed. Data are presented which show that LGCC awards a higher proportion of non-passing grades than any other community college in the City University of New York (CUNY) system; it is suggested that this is a result of the college's lack of a true failing grade. (Author/DC)