Henri Bal
Teacher
Dutch professor of computer science who contributed to the development of the Orca programming language.
He got his engineering degree from the Delft University of Technology and became a PhD student at Vrije Universiteit, where he later became a professor.
He published three influential books on computer science: Programming Distributed Systems, Programming Language Essentials, and Modern Compiler Design.
He was born in the Netherlands, but did postdoctoral work in the United States and England before returning to Amsterdam.
Dennis Ritchie is another notable computer scientist who developed an influential programming language.