Circa 1996, during my early days in college, I got this book titled “Operating Systems: Design and Implementation” by Andrew Tanenbaum. The book included the source code of a Unix flavor called Minix (mini-Unix) created by Mr. Tanenbaum for the purpose of studying Operating Systems. And that source code was written in C Language!
Little did I know that some five (05) years before I got hold of Andrew Tanenbaum’s book, this guy named Linus Torvalds found inspiration from it and eventually created Linux – the world’s widely used Operating System for enterprise use to date.