Thermodynamics

CO,NO and glass have non-zero entropy at absolute zero temperature.

at absolute zero temperature, the entropy tends to zero and the molecules of a substance or a system are in perfect order in third law of thermodynamics.

so apart from pure crystalline substance there may be difference

The entropy of a system at absolute zero is typically zero, and in all cases is determined only by the number of different ground states it has. Specifically, the entropy of a pure...