I'll explain that one. In the 1970s Burge wrote a book "Recursive Programming Techniques" explaining cool things you can do with functional programming -- yes, a lot of that stuff goes back that far. Reynolds invented a functional language called Gedanken -- the paper was iirc 1972. (I don't remember if Burge used Gedanken in his book, or if it was just similar notation, both inspired by Landin. I think it was the latter and you couldn't actually run any of the code in the book.) The pun is about fluid mechanics and 'control flow'.
This list seems more like a set of specialized studies for an 'elective' topic course.