CADR may refer to: CAR and CDR, a programming language construct used in Common Lisp or Scheme CADR, the name of a computing system developed at M.I.T.; see Lisp machine Clean Air Delivery Rate, a rating system developed for portable room air cleaners Continuous Adiabatic Demagnetisation Refrigeration, a multi-stage magnetic refrigeration system Center for Alternative Dispute Resolution, an institution that provides training and accreditation