**Arnold Robbins** is a professional programmer and technical author who has worked with Unix systems since 1980 and has been using Awk since 1987. As a member of the POSIX 1003.2 balloting group, he helped shape the POSIX standard for Awk. Arnold is the maintainer of GNU Awk (gawk) and its documentation. He is the author of the fourth edition of [*Effective awk Programming*](https://openlibrary.org/works/OL546344W) and the coauthor of [*Classic Shell Scripting*](https://openlibrary.org/works/OL546333W) (both published by O’Reilly).
