SUSAN GANTNER   began her career as a programmer for corporations in Atlanta, Georgia. Susan joined IBM in 1985 as a System/38 specialist. She moved to the IBM Rochester laboratory and later to the IBM Toronto laboratory, providing technical support and education for application developers. Susan coauthored IBM’s best-selling Redbook for RPG programmers, "Who Knew You Could Do That with RPG IV - A Sorcerer’s Guide to System Access and More." Susan left IBM in 1999 to devote more time to teaching and consulting. Together with Jon Paris, she now runs Partner400, an iSeries and AS/400 education and consulting company focused on application modernization.