There are a few changes in Summary File 1 specifications. You can access the SF1 specifications (current as of June 2000) from the State Data Center Clearinghouse website at: http://www.sdcbidc.iupui.edu/2k/products/products.html The Census Bureau can correct me if there have been any changes in SF1 plans since June 2000. Thank you Nanda Srinivasan Will the data fields for Stf 1, data by block level, be the same as they were in the 1990 census? Or can anyone tell me where to find out. I have looked through the Census web site.