Main and branch campus enrollments in all Oklahoma colleges totaled 63,561 for the summer session of 1975, an increase of 11,524 students and a percentage increase of 22.1 percent over the same period one year ago. Of the total enrollment 89 percent was in public colleges and universities, while 11 percent was in private institutions. The tables analyze the enrollments in the Oklahoma higher education institutions by such variables as: (1) type of institution (public, private); (2) off campus centers; (3) comparative head-count and full-time equivalent enrollments; (4) head-count enrollment, student-credit-hours enrolled in, and full-time equivalent enrollment; and (5) enrollment by class and sex. (JMF)