Federal Information Processing Standards - FIPS, 1994
Stuff you should read

The Population Research Institute (PRI) is currently evaluating the SODAPOP service. The ability to extract a data set containing a subset of variables will not be supported after September 15, 2016.

The data collections in SODAPOP will still be available from the PRI. If you should have concerns about this change to the SODAPOP service or need to access some of the data, contact the PRI's Computational and Spatial Analysis (CSA) core at

FIPS55, 1994 Codebook