Paul McEnroe 

Paul McEnroe obtained a master's degree in electrical engineering in 1960 while working as an associate engineer at The Boeing Company. Subsequently, he joined IBM as a lab director. At IBM, McEnroe and his team transformed the retail industry by inventing the barcode, now ubiquitous on products worldwide. Additionally, they developed the magnetic code and strip for retail use, as well as barcode scanners, both hand-held (for which McEnroe received the patent) and fixed, integrated into checkout stands. McEnroe later advanced to IBM's group director of systems development, responsible for overseeing creation of 90% of IBM's products worldwide. Purdue honored McEnroe with a Distinguished Engineering Alumnus Award in 2018.