Manifestations of order in topologically disordered media are analyzed. Amorphous materials and monatomic melts are considered as examples of disordered media. It is shown that in the case of close-packed liquids geometric and chemical short-range order are most clearly manifested in the acoustic properties. In these materials ordering is of a dynamical character. The temperature dependence of the acoustic properties correlates well with the results of x-ray and neutron diffraction methods of investigation and substantially supplements the latter. The contributions from loss of long-range order and intensification of thermal translational motion on melting are distinguished from one another by comparing the bulk moduli of elasticity of melts, crystals, and amorphous substances.