You’ve read about the process of collecting data for Census 2000 in the first part of this series (for an update on final response rates, see “Higher Returns” sidebar), and you delved into the specifics about geographic products available from this census in the second part. But what if census data were collected every year instead of every 10 years? What if those yearly data were made easily accessible on the Internet in a timely fashion? Would you think you were dreaming? Well, fantasize no longer. The Census Bureau’s newest data collection program, the ACS, and data dissemination tool, the AFF, will revolutionize the way you think about and use Census Bureau data.