This is a hypertext rendition of IBM’s FORTRAN II compiler source code for the IBM 704/709/7090/7094. Programmed by a team of individuals and reconstructed by a few others, the code consists of multiple assemblies and includes detailed cross-reference information for symbols. Each assembly is linked to index pages listing symbols alphabetically, complete with their definitions and uses. The listings feature comment and code lines, with various fields for each line. A unique feature is the head character system used for namespace separation, although FORTRAN II does not heavily utilize this feature. The content is organized into separate pages for easy navigation and offers deep dive into the code.
https://texdraft.github.io/fortran/fortran.html