After graduation from high school over half of american studentsenter institutions of higher education. the system of higher education inthe usa includes four categories of institutions: a community college, atechnical training institution, a four-year college and a university. 24generally speaking, there is not much difference between theseinstitutions of higher education. usually, a university is larger than acollege - it offers a greater variety of subjects to specialize in. moreover,a university offers special programmes of advanced studies in additionto fundamental programmes. there are … categories of institutions in the usa.