Source : WordNet®

CBR
     n : (cosmology) the cooled remnant of the hot big bang that
         fills the entire universe and can be observed today with
         an average temperature of about 2.725 kelvin [syn: {cosmic
         background radiation}, {cosmic microwave background
         radiation}, {CMBR}, {cosmic microwave background}, {CMB}]

Source : Free On-Line Dictionary of Computing

CBR
     
        {case based reasoning}