According to every history I've ever read (most notably, Backus's talk at the first History of Programming Languages) conference, Fortran was not released outsi

According to every history I've ever read (most notably, Backus's talk at the first History of Programming Languages) conference, Fortran was not released outside of IBM before this 1957 release, and there wasn't a compiler debugged enough to use much before that. (This blog post is the first I've ever heard of "Fortran 0".) https://dl.acm.org/doi/pdf/10.1145/800025.1198345 https://dl.acm.org/doi/pdf/10.1145/800025.1198345