XPost: comp.lang.lisp, alt.usage.english   
   From: ldo@nz.invalid   
      
   On Thu, 11 Jul 2024 08:01:50 +0100, Aidan Kehoe wrote:   
      
   > “Contents of the decrement register,” wasn’t it?   
      
   Might have been “displacement register”. Not sure.   
      
   There was another language from the late 1960s or so that included list   
   processing as well as a bunch of other features, called “POP-2” (later   
   variants included “POP-11” and also a combination with Prolog called   
   “Poplog”). That one decided to use the selectors “hd” and “tl” in   
   place of   
   “car” and “cdr”. Actually these names invoked functions that did   
   “lazy   
   evaluation”, allowing for lists that were not completely filled out at   
   initial creation time. There were underlying selectors called “front” and   
   “back” if you wanted to get at the elements of the actual pair that held a   
   realized element of the list.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)