The dipole glass like state was first observed in Alkali halide crystal-type dielectrics containing dipole impurities. The dipole impurities in these materials result in off-center ions which results in anomalies in certain properties like specific heat, thermal conductivity as well as some spectroscopic properties. Other materials which show a dipolar glass phase include Rb (1-x) (NH 4) x H 2 PO 4 (RADP) and Rb (1-x) (ND 4) x D 2 PO 4 (DRADP). In materials like DRADP the dipole moment is introduced due to the deuteron O-D--O bond. Dipole glass like behavior is also observed in materials like ceramics, 3D water framework and perovskites.