Kenneth E. Iverson was an American computer scientist and mathematician, best known for his work in programming languages and array processing. He created the programming language APL (A Programming Language) in the 1960s, which is notable for its concise syntax and powerful capabilities for handling complex data structures. Iverson's contributions extended beyond APL; he also authored several influential books and papers on programming and mathematics. His work has had a lasting impact on the fields of computer science and software development, influencing the design of modern programming languages and tools used for data analysis and manipulation.