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)
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05.20.y Classical statistical mechanics
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05.30.d Quantum statistical mechanics (for quantum fluids aspects, see 67.10.Fj)
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 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)
 05.45.a Nonlinear dynamics and chaos (see also section 45 Classical mechanics of discrete systems; for chaos in fluid dynamics, see 47.52.+j)
 05.50.+q Lattice theory and statistics (Ising, Potts, etc.) (see also 64.60.Cn Orderdisorder transformations, and 75.10.Hk Classical spin models)
 05.60.k Transport processes
 05.65.+b Selforganized systems (see also 45.70.n in classical mechanics of discrete systems)

05.70.a Thermodynamics (see also section 64 Equations of state, phase equilibria, and phase transitions, and section 65 Thermal properties of condensed matter; for chemical thermodynamics, see 82.60.s; for thermodynamics of plasmas, see 52.25.Kn; for thermodynam
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 05.90.+m Other topics in statistical physics, thermodynamics, and nonlinear dynamical systems (restricted to new topics in section 05)