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Bill Jelen is the owner of MrExcel.com since November 1998, where Bill publishes information and books focused on Microsoft Excel. As an established author, Bill has contributed to titles such as Special Edition Using Excel 2016 and VBA & Macros for Microsoft Excel through Pearson Publishing and Holy Macro! Books. Bill also serves as a photographer for We Report Space, documenting rocket launches at Cape Canaveral since December 2015. In addition, Bill contributes to the book "1 Habit: 100 Habits from the Happiest Achievers on the Planet." Previously, Bill held editorial and educational roles, including contributing editor for CFO Publishing and part-time faculty at the University of Akron. Bill's educational background includes a BBA in Management from the University of Notre Dame.