QCD and models on multiplicities in e+e- and pp-bar interactions

A brief survey of theoretical approaches to description of multiplicity distributions in high-energy processes is given. It is argued that the multicomponent nature of these processes leads to some peculiar characteristics observed experimentally. Predictions for LHC energies are presented. It is shown that similarity of the energy dependence of average multiplicities in different reactions is not enough alone to suggest the universal mechanism of particle production in strongly interacting systems. Other characteristics of multiplicity distributions depend on the nature of colliding partners