is data which has already been summarized or added up, usually for specific geographic units or some other unit, such as industry classifications. In this case, each record is a geographic unit, and there is no summing needed to get the totals for the geographies.

Please follow the links to go through the DataFerrett Tutorial

1. Getting Started
    Learn the basic help functions in the DataFerrett interface

2. Searching, Tabulation, and Graphing
    Going through the 3 basic steps in using DataFerrett

3. Extracting Data
    Using the Extraction interface

4. Mapping
    Displaying variables with state, county, tract geographies using the map function