Cons Concepts (ANSI and GNU Common Lisp Document)

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### 14.1 Cons Concepts

A cons is a compound data object having two components called the car and the cdr.

      car  cons    rplacd
      cdr  rplaca

      Figure 14–1: Some defined names relating to conses.

Depending on context, a group of connected conses can be viewed in a variety of different ways. A variety of operations is provided to support each of these various views.