The EEO-1 or "Employer Information Report"  must be filed annually with the EEOC by all employers that have at least 100 employees, and by those that have at least 50 employees and $50,000 worth of federal government contracts.  The EEO-1 requires employers to provide the government with a count of employees by job category, broken down by race, ethnicity and gender.

The EEO-1 has been around since the mid-1960's.  A revised version must be filed for reports due starting on September 30, 2007.

The EEOC's FAQ's are helpful.   Extensive filing instructions are also available.  Section D – Employment Data, is the only part of the form that has changed.