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  Classify by duration of bonds : short-term bonds, medium-term bonds, or long-term bonds

  Classify by coupon types :  fixed rate coupon bonds, floating rate coupon bonds, compound interest bonds, and zero coupon bond

  Classify by issuing types :

          Scrip : the bond issued in a certificate or other instruments with the name of the bondholder.

          Scripless : a bond issued in the form of entries and not embodied in or represented by a certificate or other instrument