Currently there is an effort in GNU Emacs project to move a subset of Common Lisp in Emacs Lisp under the <i>cl</i> prefix, so one would say cl-let or cl-values, etc.<p>It seems like a cool idea. If you disagree with some of CL&#x27;s  design or stylistic choices, which people familiar with Arc or Scheme would do, moving it out of the way is a good idea.<p>BTW, a long ago in order or incorporate CL into Symbolics Zeta Lisp they used <i>cl:</i> prefix for some functions. Nothing is new under the Moon.)