The Census Bureau released a large portion of the 2000 Census on CD-ROM and DVDs. The Columbia Electronic Data Service (EDS), located in Room 201 of Lehman Library, has all CD-ROM and DVD products released by the Census Bureau.
Census 2000 results were released in four Summary Files (SFs). What makes these files especially valuable is that they have tabulations for a vast array of geographic areas down to the level of census blocks (SF 1), block groups (SF 3), and census tracts (all four SFs). They are much larger files than the comparable files from previous censuses. Note: In previous censuses, these files were known as Summary Tape Files (STFs). Summary Files 1 and 2 are based on the 100-percent or "short form" questions asked of the entire population; Summary Files 3 and 4 are based on the sample or "long form" questions asked of a sample of the population. Summary Files 2 and 4 consist of a subset of tables from Summary Files 1 and 3 respectively that are repeated for various population groups provided a group meets certain population thresholds for the area under scrutiny. (Summary File 4 also has a few tables that did not occur in Summary File 3.)