14.1.2.1 Lists as Association Lists

An association list is a list of conses representing an association of keys with values, where the car of each cons is the key and the cdr is the value associated with that key.

  acons  assoc-if      pairlis  rassoc-if      
  assoc  assoc-if-not  rassoc   rassoc-if-not  

  Figure 14–4: Some defined names related to assocation lists.