72.00.00 Electronic transport in condensed matter (for electronic transport in surfaces, interfaces, and thin films, see section 73; for electrical properties related to treatment conditions, see 81.40.Rs; for transport properties of superconductors, see 74.25.Fy;
72.15.-v Electronic conduction in metals and alloys
72.20.-i Conductivity phenomena in semiconductors and insulators (see also 66.70.-f Nonelectronic thermal conduction and heat-pulse propagation in solids; thermal waves)
72.25.-b Spin polarized transport (for ballistic magnetoresistance, see 75.47.Jn; for spin polarized transport devices, see 85.75.-d)
72.30.+q High-frequency effects; plasma effects
72.40.+w Photoconduction and photovoltaic effects
72.50.+b Acoustoelectric effects
72.55.+s Magnetoacoustic effects (see also 75.80.+q Magnetomechanical and magnetoelectric effects, magnetostriction)
72.60.+g Mixed conductivity and conductivity transitions
72.70.+m Noise processes and phenomena
72.80.-r Conductivity of specific materials (for conductivity of metals and alloys, see 72.15.-v)
72.90.+y Other topics in electronic transport in condensed matter (restricted to new topics in section 72)