05.00.00 Statistical physics, thermodynamics, and nonlinear dynamical systems (see also 02.50.-r Probability theory, stochastic processes, and statistics)

05.10.-a Computational methods in statistical physics and nonlinear dynamics (see also 02.70.-c in mathematical methods in physics)

05.20.-y Classical statistical mechanics

05.30.-d Quantum statistical mechanics (for quantum fluids aspects, see 67.10.Fj)

05.40.-a Fluctuation phenomena, random processes, noise, and Brownian motion (for fluctuations in superconductivity, see 74.40.+k; for statistical theory and fluctuations in nuclear reactions, see 24.60.-k; for fluctuations in plasma, see 52.25.Gj)