So back in the heyday of Fortran II, it did work on smaller computers. One key frustration I had with Fortran II was that you couldn't put expressions in the e

So back in the heyday of Fortran II, it did work on smaller computers. One key frustration I had with Fortran II was that you couldn't put expressions in the elements of a DO loop. Nobody could tell me why. So I bought a book on compilers https://www.amazon.com/compiler-generator-William-M-McKeeman/dp/B007EUHZ2U https://www.amazon.com/compiler-generator-William-M-McKeeman... and dove in. I ported got the XPL compiler to run on our SIGMA 5 and actually used it in some production jobs. Then, I got a job at Sycor on a team of 3 writing a compiler for a derivative of PL/M targeting the 8085. The compiler was written in Bliss 36. Was serious fun and had major impact on how they developed their software. I have long left Fortran behind. I have many other languages under my belt now, and no desire to revisit.