Dr. Ron Cody was a Professor of Biostatistics at the Rutgers, Robert Wood Johnson Medical School in New Jersey for 26 years and is now a private consultant and writer. He has been a SAS user since the late 70's and is the coauthor of Applied Statistics and the SAS® Programming Language (fifth edition). He has also authored the following books with SAS Press: Learning SAS by Example: A Programmer's Guide, SAS Functions by Example, 2nd edition, Cody's Data Cleaning Techniques, 2nd edition, Longitudinal Data and SAS: A Programmer's Guide, SAS Statistics by Example, The SAS Workbook, Cody's Collection of Popular Programming Tasks and How to Tackle Them, and Test Scoring and Analysis Using SAS. He is currently an instructor for SAS Institute and is a frequent speaker at local, regional, and national SAS conferences.