Probabilistic Modeling.From Physics to Computing Science

It is important in computing science to estimate the number of data blocks needed to answer a query.Three different answers to this problem emerged respectively in 1975, 1977, and 1982.This article investigates the basic differences of the three models and observes that the same differences were shared a long time ago by the physicists who used different models for the behavior of elementary particles to obtain the Maxwell-Boltzmann statistics, the Bose-Einstein statistics, and the Fermi-Dirac statistics.