Dennis Ritchie's PhD Dissertation [pdf]

Somewhat related: How did Dennis Ritchie produce his PhD thesis? A typographical mystery (2022) [pdf] (477 points, 2023, 168 comments) https://news.ycombinator.com/item?id=35177110

Background discussion: https://computerhistory.org/blog/discovering-dennis-ritchies...

Typing an equation-heavy PhD dissertation in the days before word processors or tools like LaTeX were available must have been only slightly less involved than the research being written up.