Registrar's Enrollment Reports
These reports show the term headcount data as of the census date (defined as "as of the end of the tenth day of instruction") and will reflect the data that is submitted to UW System and the Department of Education (IPEDS). Also included are breakout counts by gender, college and program, admissions type, residency and major, student distributions by age, credits carried, high school percentiles, and student population geographic distributions.
Preliminary reports are as of the end of the 10th day of classes. The Final 'Official' Report will be as of the end of the sixth week of classes. The headcount and credit count remains stable between the two reports (end of the tenth day of classes) but the final report will reflect corrections to the data and changes in detail, such as program, plan, and residency that have occurred since the 10th day of classes.
Definitions of the terms used in the reports can be found here.