80.   CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY

 81.	Materials science

 81.05.-t	Specific materials: fabrication, treatment, testing and analysis
           	Superconducting materials, see 74.70 and 74.72
           	Magnetic materials, see 75.50
           	Optical materials, see 42.70
           	Dielectric, piezoelectric, and ferroelectric materials, see 77.80
           	Colloids, gels, and emulsions, see 82.70.D, G, K respectively
           	Biological materials, see 87
 81.05.Bx	Metals, semimetals, and alloys
 81.05.Cy	Elemental semiconductors
 81.05.Dz	II–VI semiconductors
 81.05.Ea	III–V semiconductors
 81.05.Gc	Amorphous semiconductors
 81.05.Hd	Other semiconductors
 81.05.Je	Ceramics and refractories (including borides, carbides, hydrides, nitrides, oxides, and silicides)
 81.05.Kf	Glasses (including metallic glasses)
 81.05.Lg	Polymers and plastics; rubber; synthetic and natural fibers; organometallic and organic materials
 81.05.Mh	Cermets, ceramic and refractory composites
 81.05.Ni	Dispersion-, fiber-, and platelet-reinforced metal-based composites
 81.05.Pj	Glass-based composites, vitroceramics
 81.05.Qk	Reinforced polymers and polymer-based composites
 81.05.Rm	Porous materials; granular materials
 81.05.Tp	Fullerenes and related materials; diamonds, graphite
 81.05.Ys	Nanophase materials
 81.05.Zx	New materials: theory, design, and fabrication

 81.10.-h	Methods of crystal growth; physics of crystal growth (for crystal structure, see 61)
 81.10.Aj	Theory and models of crystal growth; physics of crystal growth, crystal morphology and orientation
 81.10.Bk	Growth from vapor
 81.10.Dn	Growth from solutions
 81.10.Fq	Growth from melts; zone melting and refining
 81.10.Jt	Growth from solid phases (including multiphase diffusion and recrystallization)
 81.10.Mx	Growth in microgravity environments

 81.15.-z	Methods of deposition of films and coatings; film growth and epitaxy (for structure of thin films, see 68.55; see also 85.40.S Deposition technology)
 81.15.Cd	Deposition by sputtering
 81.15.Ef	Vacuum deposition
 81.15.Fg	Laser deposition
 81.15.Gh	Chemical vapor deposition (including plasma-enhanced CVD, MOCVD, etc.)
 81.15.Hi	Molecular, atomic, ion, and chemical beam epitaxy
 81.15.Jj	Ion and electron beam-assisted deposition; ion plating
 81.15.Kk	Vapor phase epitaxy
 81.15.Lm	Liquid phase epitaxy; deposition from liquid phases (melts, solutions, and surface layers on liquids)
 81.15.Np	Solid phase epitaxy; growth from solid phases
 81.15.Pq	Electrodeposition, electroplating
 81.15.Rs	Spray coating techniques
 81.15.Tv	Other methods of film growth and epitaxy

 81.20.-n	Methods of materials synthesis and materials processing (for ion implantation and doping, see 61.72)
           	Crystal growth, see 81.10
           	Film deposition, film growth and epitaxy, see 81.15
           	Plasma applications in manufacturing and materials processing, see 52.75.R
 81.20.Ev	Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation
 81.20.Fw	Sol–gel processing, precipitation
 81.20.Hy	Forming; molding, extrusion etc.
 81.20.Ka	Chemical synthesis; combustion synthesis
           	Chemical vapor deposition, see 81.15.G
 81.20.Rg	Aerosols in materials synthesis and processing
 81.20.Vj	Joining; welding
 81.20.Wk	Machining, milling
 81.20.Ym	Purification
 81.20.Zx	Other methods of materials synthesis and materials processing

 81.30.-t	Phase diagrams and microstructures developed by solidification and solid–solid phase transformations (see also 64.70.K Solid–solid transitions)
 81.30.Bx	Phase diagrams of metals and alloys
 81.30.Dz	Phase diagrams of other materials (for phase diagrams of superconductors, see 74.25.D)
 81.30.Fb	Solidification
 81.30.Hd	Constant-composition solid–solid phase transformations: polymorphic, massive, and order–disorder
 81.30.Kf	Martensitic transformations
 81.30.Mh	Solid-phase precipitation (see also 64.75 Solubility, segregation, and mixing; phase separation)

           	Granular materials, see 81.05.R

 81.40.-z	Treatment of materials and its effects on microstructure and properties
 81.40.Cd	Solid solution hardening, precipitation hardening, and dispersion hardening; aging
 81.40.Ef	Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization
 81.40.Gh	Other heat and thermomechanical treatments
 81.40.Jj	Elasticity and anelasticity, stress-strain relations
 81.40.Lm	Deformation, plasticity, and creep (see also 83.50—in rheology)
 81.40.Np	Fatigue, corrosion fatigue, embrittlement, cracking, fracture and failure
 81.40.Pq	Friction, lubrication, and wear
 81.40.Rs	Electrical and magnetic properties (related to treatment conditions)
 81.40.Tv	Optical and dielectric properties (related to treatment conditions)
 81.40.Vw	Pressure treatment (see also 62.50.P High-pressure and shock-wave effects in solids and liquids)
 81.40.Wx	Radiation treatment (particle and electromagnetic) (see also 61.80 Physical radiation effects, radiation damage)

           	Etching, corrosion, oxidation, and other surface treatments, see 81.65

 81.65.-b	Surface treatments (see also 85.40 Microelectronics: LSI, VLSI, ULSI; integrated circuit fabrication technology)
 81.65.Cf	Surface cleaning, etching, patterning
 81.65.Kn	Corrosion protection
 81.65.Lp	Surface hardening: nitridation, carburization, carbonitridation
 81.65.Mq	Oxidation
 81.65.Ps	Polishing
 81.65.Rv	Passivation
 81.65.Tx	Gettering
 81.65.Ya	Other surface treatments

 81.70.-q	Methods of materials testing and analysis (for specific chemical analysis methods, see 82.80)
 81.70.Bt	Mechanical testing, impact tests, static and dynamic loads
 81.70.Cv	Nondestructive testing: ultrasonic testing, photoacoustic testing
 81.70.Ex	Nondestructive testing: electromagnetic testing, eddy-current testing
 81.70.Fy	Nondestructive testing: optical methods
 81.70.Ha	Testing in microgravity environments
 81.70.Jb	Chemical composition analysis, chemical depth and dopant profiling
 81.70.Pg	Thermal analysis, differential thermal analysis (DTA), differential thermogravimetric analysis
 81.70.Yp	Other methods of materials testing and analysis

 81.90.+c	Other topics in materials science

 82.	Physical chemistry (for physical chemistry of solutions of biomolecules, see 87.15.D)

 82.20.-w	Chemical kinetics (see also 31.15 Calculations and mathematical techniques in atomic and molecular physics and 31.25 Electronic correlation calculations for atoms and molecules)
 82.20.Db	Statistical theories (including transition state)
 82.20.Fd	Stochastic and trajectory models, other theories and models
 82.20.Hf	Mechanisms and product distribution
 82.20.Kh	Potential energy surfaces for chemical reactions (for potential energy surfaces for collisions, see 34.20.M)
 82.20.Mj	Nonequilibrium kinetics
 82.20.Pm	Rate constants, reaction cross sections, and activation energies
 82.20.Rp	Energy distribution and transfer; relaxation (see also 31.70.H Time-dependent phenomena—in atomic and molecular physics)
 82.20.Tr	Kinetic and isotope effects
 82.20.Wt	Computational modeling; simulation

 82.30.-b	Specific chemical reactions; reaction mechanisms
 82.30.Cf	Atom and radical reactions; chain reactions
 82.30.Eh	Molecule–molecule reactions
 82.30.Fi	Ion–molecule, ion–ion, and charge-transfer reactions (see also 34.70 Charge transfer in atomic and molecular collisions)
 82.30.Hk	Chemical exchanges (substitution, atom transfer, abstraction, disproportionation, and group exchange)
 82.30.Lp	Decomposition reactions (pyrolysis, dissociation, and group ejection)
 82.30.Nr	Association, addition, insertion, cluster formation, hydrogen bonding
 82.30.Qt	Isomerization and rearrangement
 82.30.Vy	Homogeneous catalysis (for heterogeneous catalysis at surfaces, see 82.65.J)

 82.35.+t	Polymer reactions and polymerization

 82.40.-g	Chemical kinetics and reactions: special regimes and techniques
           	Chemically reactive flows, see 47.70.F
 82.40.Bj	Oscillations, chaos, and bifurcations in homogeneous nonequilibrium reactors
 82.40.Ck	Pattern formation in vortices–diffusion systems (see also 47.54 Pattern selection and 47.32.C Vortex dynamics)
 82.40.Dm	Atomic and molecular beam reactions
 82.40.Fp	Shock waves (see also 47.40.N Shock-wave interactions and shock effects)
 82.40.Js	Fast and ultrafast reactions
 82.40.Mw	Pulse techniques
 82.40.Py	Flames, combustion, and explosions
 82.40.Ra	Plasma reactions (including flowing afterglow and electric discharges) (see also 81.15.G Chemical vapor deposition)
 82.40.Tc	Chemiluminescence and chemical laser kinetics (see also 78.60.P Chemiluminescence in optical properties of condensed matter)
 82.40.We	Atmospheric chemistry (see also 94.10.F Atmospheric composition, chemical reactions and processes)

 82.45.+z	Electrochemistry and electrophoresis (see also 66.10.E Ionic conduction; for electroosmosis, see 82.65.F; for electrochemical processes in biological membranes, see 87.22.F)

 82.50.-m	Photochemistry and radiation chemistry (for photochemical reactions of biomolecules, see 87.15.R)
 82.50.Fv	Photolysis, photodissociation, and photoionization by infrared, visible, and ultraviolet radiation
 82.50.Gw	Radiolysis, dissociation, and ionization by x-ray,  -ray, and particle radiation

 82.55.+e	Radiochemistry (including hot atom reactions, positronium and muonium chemistry) (see also 23 Radioactive decay and in-beam spectroscopy)

 82.60.-s	Chemical thermodynamics (see also 05.70 Thermodynamics)
 82.60.Cx	Enthalpies of combustion, reaction, and formation
 82.60.Fa	Heat capacities and heats of phase transitions
 82.60.Hc	Chemical equilibria and equilibrium constants
 82.60.Lf	Thermodynamics of solutions
 82.60.Nh	Thermodynamics of nucleation (see also 64.60.Q Nucleation—in equations of state, phase equilibria and phase transitions)

 82.65.-i	Surface and interface chemistry (see also 68.35.M Surface energy; thermodynamic properties)
 82.65.Dp	Thermodynamics of surfaces and interfaces
 82.65.Fr	Film and membrane processes: ion exchange, dialysis, osmosis, electroosmosis
 82.65.Jv	Heterogeneous catalysis at surfaces (for homogeneous catalysis, see 82.30.V)
 82.65.My	Chemisorption (see also 68.45 Solid–fluid interfaces)
 82.65.Pa	Surface-enhanced molecular states and other gas–surface interactions (see also 34.50.D Interactions of atoms, molecules, and their ions with surfaces; photon and electron emission; neutralization of ions)
 82.65.Yh	Other surface and interface chemical processes

 82.70.-y	Disperse systems
 82.70.Dd	Colloids
 82.70.Gg	Gels and sols
 82.70.Kj	Emulsions and suspensions
 82.70.Rr	Aerosols and foams

 82.80.-d	Chemical analysis and related physical methods of analysis (for related instrumentation, see 07; for biochemical analytic techniques, see 87.64)
 82.80.Bg	Chromatography
 82.80.Ch	Ultraviolet, visible, infrared, Raman, microwave, and magnetic resonance spectroscopic analysis methods; spectrophotometry; colorimetry
 82.80.Ej	X-ray, Mössbauer, and other  -ray spectroscopic analysis methods
 82.80.Fk	Electrochemical methods
 82.80.Jp	Activation analysis and other radiochemical methods
 82.80.Kq	Energy-conversion spectro-analytical methods (e.g., photoacoustic, photothermal, and optogalvanic spectroscopic methods)
 82.80.Ms	Mass spectrometry (including SIMS, multiphoton ionization and resonance ionization mass spectrometry)
 82.80.Pv	Electron spectroscopy (x-ray photoelectron (XPS), Auger electron spectroscopy(AES), etc.)
 82.80.Sy	Methods using colligative properties
 82.80.Yc	Rutherford backscattering (RBS), and other methods of chemical analysis

 82.90.+j	Other topics in physical chemistry

 83.	Rheology (see also 47 Fluid dynamics)

 83.10.-y	Fundamentals and general
 83.10.Bb	Kinematics of deformation and flow
 83.10.Dd	Dynamics of continuous media
 83.10.Ff	Continuum mechanics
 83.10.Hh	Flow of solids
 83.10.Ji	Fluid dynamics (nonlinear fluids)
 83.10.Lk	Multiphase flows
 83.10.Nn	Polymer dynamics
 83.10.Pp	Particle dynamics

 83.20.-d	Constitutive relations
 83.20.Bg	Macroscopic (phenomenological) theories
 83.20.Di	Microscopic (molecular) theories
 83.20.Fk	Reptation theories
 83.20.Hn	Structural and phase changes
 83.20.Jp	Computer simulation
 83.20.Lr	Boundary conditions

 83.50.-v	Deformation; material flow
 83.50.Ax	Steady shear flows
 83.50.By	Transient deformation and flow; time-dependent properties: start-up, stress relaxation, creep, recovery, etc.
 83.50.Cz	Injection molding
 83.50.Da	Compression molding
 83.50.Eb	Weissenberg effect
 83.50.Fc	Linear viscoelasticity
 83.50.Gd	Nonlinear viscoelasticity
 83.50.Jf	Extensional and combined flows
 83.50.Lh	Interfacial and free surface flows; slip
 83.50.Nj	Viscoplasticity; yield stress
 83.50.Pk	Effects of electric and magnetic fields
 83.50.Qm	Thixotropy; thickening flows
 83.50.Sp	Thermorheological properties; non-isothermal rheology
 83.50.Tq	Wave propagation, shocks, fracture, and crack healing
 83.50.Vr	Wave speed
 83.50.Ws	Chaotic flows; drag reduction
 83.50.Yt	Flows in processing machinery

 83.70.-f	Material form
 83.70.Bi	Homogeneous solids
 83.70.Dk	Composite solids
 83.70.Fn	Granular solids
 83.70.Gp	Homogeneous isotropic liquids; solutions and melts
 83.70.Hq	Heterogeneous liquids: suspensions, dispersions, emulsions, pastes, slurries, foams, block copolymers, etc.
 83.70.Jr	Liquid crystals: nematic, cholesteric, smectic, discotic, etc.

 83.80.-k	Material types
 83.80.Bp	Thermoplastic polymers
 83.80.Cq	Thermosetting polymers
 83.80.Dr	Elastomeric polymers
 83.80.Es	Polymer blends
 83.80.Gv	Electro- and magnetorheological fluids
 83.80.Jx	Chemically reactive materials
 83.80.Lz	Biological materials: blood, collagen, wood, food, etc.
 83.80.Nb	Geological materials: Earth, magma, ice, rocks, etc.
 83.80.Pc	Inorganic materials

 83.85.-c	Techniques and apparatus
 83.85.Cg	Rheological measurements
 83.85.Ei	Optical methods; sonography
 83.85.Gk	Sensors
 83.85.Jn	Viscosity measurements
 83.85.Lq	Normal stress measurements
 83.85.Ns	Data analysis (interconversion of experiments; computation of relaxation and retardation spectra; time–temperature superposition, etc.)
 83.85.Pt	Flow computation (e.g. finite element) (see also 02.70—in Mathematical methods in physics)

 83.90.+s	Other topics in rheology

 84.	Electronics; radiowave and microwave technology; direct energy conversion and storage

 84.30.-r	Electronic circuits (for integrated circuits, see 85.40)
 84.30.Bv	Circuit theory (including computer-aided circuit design and analysis)
           	Microwave circuits, see 84.40.D
 84.30.Jc	Power electronics; power supply circuits (see also 84.70 High-current and high-voltage technology)
 84.30.Le	Amplifiers
 84.30.Ng	Oscillators, pulse generators, and function generators
 84.30.Qi	Modulators and demodulators; discriminators, comparators, mixers, limiters, and compressors
 84.30.Sk	Pulse and digital circuits
 84.30.Vn	Filters
           	Special purpose circuits, see 07.50.E
 84.30.Yq	Other electronic circuits

 84.32.-y	Passive circuit components (see also 07.50 Electrical and electronic components, instruments, and techniques)
 84.32.Dd	Connectors, relays, and switches
 84.32.Ff	Conductors, resistors (including thermistors, varistors, and photoresistors)
 84.32.Hh	Inductors and coils; wiring
 84.32.Tt	Capacitors
 84.32.Vv	Fuses

 84.35.+i	Neural networks (for optical neural networks, see 42.79.T, see also 07.05.M Neural networks, fuzzy logic, artificial intelligence)

 84.37.+q	Electric variable measurements (including voltage, current, resistance, capacitance, inductance, impedance, and admittance, etc.)

 84.40.-x	Radiowave and microwave (including millimeter wave) technology
           	Microwave, submillimeter wave, and radiowave receivers and detectors, see 07.57.K
           	Microwave and radiowave spectrometers, see 07.57.P
           	Electromagnetic wave propagation, see 41.20.J
 84.40.Az	Waveguides, transmission lines, striplines
 84.40.Ba	Antennas: theory, components and accessories (for plasma interactions with antennas, see 52.40.F in Plasma physics)
 84.40.Dc	Microwave circuits
 84.40.Fe	Microwave tubes (e.g. klystrons, magnetrons, traveling-wave, backward-wave tubes, etc.)
 84.40.Ik	Masers; gyrotrons (cyclotron-resonance masers)
 84.40.Lj	Microwave integrated electronics
 84.40.Ua	Telecommunications: signal transmission and processing; communication satellites (for optical communications, see 42.79.S)
 84.40.Xb	Telemetry: remote control, remote sensing; radar
 84.40.Zc	Other topics in radiowave and microwave technology

 84.47.+w	Vacuum tubes (see also 85.45 Vacuum microelectronics)

           	Phototubes, see 85.60.H

           	Microwave tubes, see 84.40.F

 84.50.+d	Electric motors

 84.60.-h	Direct energy conversion and storage
 84.60.Bk	Performance characteristics of energy conversion systems; figure of merit
 84.60.Dn	Electrochemical conversion and storage: electrochemical cells and batteries; fuel cells
 84.60.Jt	Photoelectric conversion: solar cells and arrays (for solar collectors and concentrators, see 42.79.E)
 84.60.Lw	Magnetohydrodynamic conversion (for MHD generators, see 52.75.F—in plasma physics)
 84.60.Ny	Thermionic conversion (for thermionic generators, see 52.75.F—in plasma physics)
 84.60.Rb	Thermoelectric, electrogasdynamic and other direct energy conversion
 84.60.Ve	Energy storage systems, including capacitor banks

 84.70.+p	High-current and high-voltage technology: power systems; power transmission lines and cables (including superconducting cables)

 84.90.+a	Other topics in electronics, radiowave and microwave technology, and direct energy conversion and storage

 85.	Electronic and magnetic devices; microelectronics

           	Vacuum tubes, see 84.47

           	Microwave tubes, see 84.40.F

           	Cathode-ray and storage tubes, see 84.47

           	Phototubes, see 85.60.H

           	Conductors, inductors, and switches, see 84.32

 85.25.-j	Superconducting devices
 85.25.Am	Superconducting device characterization, design, and modeling
 85.25.Cp	Josephson devices
 85.25.Dq	Superconducting quantum interference devices (SQUIDs)
 85.25.Hv	Superconducting logic elements and memory devices
 85.25.Kx	Superconducting wires, fibers, and tapes
 85.25.Ly	Superconducting magnets; magnetic levitation devices (for superconducting cables, see 84.70)
 85.25.Na	Superconducting microelectronic circuits
 85.25.Pb	Superconducting infrared, submillimeter and millimeter wave detectors
           	High power superconducting devices, see 84.70
 85.25.Qc	Superconducting surface acoustic wave devices and other superconducting devices

 85.30.-z	Semiconductor devices (for photodiodes, phototransistors, and photoresistors, see 85.60.D; for laser diodes, see 42.55.P)
 85.30.De	Semiconductor-device characterization, design, and modeling
 85.30.Fg	Bulk semiconductor and conductivity oscillation devices (including Hall effect devices, space-charge-limited devices, and Gunn effect devices)
 85.30.Hi	Surface barrier, boundary, and point contact devices
 85.30.Kk	Junction diodes
 85.30.Mn	Junction breakdown and tunneling devices (including resonance tunneling devices)
 85.30.Pq	Bipolar transistors
 85.30.Rs	Thyristors
 85.30.St	Quantum interference devices
 85.30.Tv	Field effect devices
 85.30.Vw	Low-dimensional quantum devices (quantum dots, quantum wires etc.)
 85.30.Wx	Single electron devices
 85.30.Yy	Other semiconductor devices

 85.40.-e	Microelectronics: LSI, VLSI, ULSI; integrated circuit fabrication technology (see also 85.45 Vacuum microelectronics, 85.30 Semiconductor devices, and 81.65 Surface treatments)
           	Microwave integrated electronics, see 84.40.L
           	Optoelectronic integrated circuits, see 42.82
           	Superconducting integrated circuits, see 85.25.N
 85.40.Bh	Computer-aided design of microcircuits; layout and modeling
 85.40.Hp	Lithography, masks and pattern transfer
           	Micromechanical devices and systems, see 07.10.C
 85.40.Ls	Metallization, contacts, interconnects; device isolation
 85.40.Qx	Microcircuit quality, noise, performance, and failure analysis
 85.40.Ry	Impurity doping, diffusion and ion implantation technology
 85.40.Sz	Deposition technology (for plasma applications in deposition technology, see 52.75.R)
 85.40.Ux	Nanometer-scale fabrication technology
           	Bipolar integrated circuits, see 85.30.P
           	Field effect integrated circuits, see 85.30.T
           	Surface acoustic wave microelectronic circuits, see 85.30.Y
 85.40.Yd	Other topics in microelectronics and integrated circuit fabrication technologies

           	Nanometer-scale fabrication technology, see 85.40.U

           	Nanophase materials, see 81.05.Y

           	Micromechanical devices and systems, see 07.10.C

 85.45.-w	Vacuum microelectronics
           	Microwave vacuum microelectronic devices, see 84.40
 85.45.Bz	Vacuum microelectronic device characterization, design, and modeling
 85.45.Db	Field emitter and arrays, cold electron emitters
 85.45.Fd	Field emission displays (FEDs)
 85.45.Yv	Other vacuum microelectronic devices

 85.50.+k	Dielectric, ferroelectric, and piezoelectric devices (see also 43.38.F Piezoelectric and ferroelectric transducers in acoustic appendix)

           	Capacitors, see 84.32.T

 85.60.-q	Optoelectronic devices (see also 42.79 Optical elements, devices and systems)
 85.60.Bt	Optoelectronic device characterization, design, and modeling
 85.60.Dw	Photodiodes; phototransistors; photoresistors
 85.60.Gz	Photodetectors (including infrared and CCD detectors) (for superconducting infrared detectors, see 85.25.P)
 85.60.Ha	Photomultipliers; phototubes and photocathodes
 85.60.Jb	Light-emitting devices
 85.60.Me	Other optoelectronic devices
 85.60.Pg	Display systems (for field emission display, see 85.45.F, for optical display devices, see 42.79.K, see also 07.07.H Display and recording equipment, oscilloscopes, TV cameras, etc.)

 85.65.+h	Molecular electronic devices

 85.70.-w	Magnetic devices
 85.70.Ay	Magnetic device characterization, design, and modeling
 85.70.Ec	Magnetostrictive, magnetoacoustic, and magnetostatic devices (for magnetostrictive transducers, see 43.38.C in acoustics appendix)
           	Magnetic recording materials, see 75.50.S
 85.70.Ge	Ferrite and garnet devices
 85.70.Kh	Magnetic thin film devices: magnetic heads (magnetoresistive, inductive, etc.); domain-motion devices, etc.
 85.70.Li	Other magnetic recording and storage devices (including tapes, disks, and drums)
           	Magnets, see 07.55.D
           	Superconducting magnets and magnetic levitation devices, see 85.25.L
           	Beam bending magnets, see 41.85.L
 85.70.Rp	Magnetic levitation, propulsion and control devices (for superconducting-magnetic levitation devices, see 85.25.L)
 85.70.Sq	Magnetooptical devices
 85.70.Yv	Other magnetic devices

 85.80.-b	Electrochemical, thermoelectromagnetic, and other devices (for acoustoelectric devices, see 43.38)
 85.80.Dg	Electrochemical devices
 85.80.Fi	Thermoelectric devices
 85.80.Jm	Magnetoelectric devices
 85.80.Lp	Magnetothermal devices

 85.90.+h	Other topics in electronic and magnetic devices and microelectronics

 87.	Biological and medical physics

 87.10.+e	General, theoretical, and mathematical biophysics (including logic of biosystems, quantum biology, and relevant aspects of thermodynamics, information theory, cybernetics, and bionics)

 87.15.-v	Molecular biophysics
 87.15.By	Structure, bonding, conformation, configuration, and isomerism of biomolecules
 87.15.Da	Physical chemistry of solutions of biomolecules; condensed states
 87.15.He	Molecular dynamics and conformational changes
 87.15.Kg	Molecular interactions
 87.15.Mi	Spectra, photodissociation, and photoionization of biomolecules; bioluminescence
 87.15.Rn	Photochemical reactions of biomolecules; biochemical reaction mechanisms and kinetics; enzymatic catalysis; model reactions

 87.22.-q	Physics of cellular and physiological processes
 87.22.As	General theory and phenomenology
 87.22.Bt	Membrane and subcellular physics and structure
 87.22.Fy	Active transport processes across biological membranes; intracellular electron transport; energy transduction (including photosynthesis and oxidative phosphorylation)
 87.22.Jb	Muscle contraction, nerve conduction, synaptic transmission, memorization, and other neurophysiological processes (excluding perception processes and speech)
 87.22.Me	Enzymatic catalysis
 87.22.Nf	Mechano- and chemoceptions (including biosonic generation, detection, and guidance)
 87.22.Pg	Biothermics
           	Physiological optics, see 42.66
           	Physiological acoustics, see 43.64
           	Psychological acoustics, see 43.66
           	Speech production, see 43.70
           	Speech perception, see 43.71
           	Speech processing and communication systems, see 43.72

 87.40.+w	Biomagnetism (cardiomagnetism, neuromagnetism, tissue susceptibility) and magnetobiology (magnetic field effects on cellular processes, and on navigation and behavior of various species)

 87.45.-k	Biomechanics, biorheology, and biological fluid dynamics (see also 83.80.L—in rheology; for rheological properties of biological materials, see 83.50)
 87.45.Bp	Mechanical properties of tissues and organs
 87.45.Dr	Physics of body movements
 87.45.Ft	Rheology of body fluids
 87.45.Hw	Haemodynamics, pneumodynamics

 87.50.-a	Biological effects of electromagnetic and particle radiation (see also 28.41.T Protection systems, safety, radiation monitoring, accidents, and dismantling, 28.52.N Safety)
 87.50.Gi	Ionizing radiations (ultraviolet, x-rays,  -rays, ions, electrons, positrons, neutrons, and mesons, etc.)
 87.50.Hj	Optical radiation (near ultraviolet, visible, and infrared)
 87.50.Jk	Radiofrequency and microwave radiation (power lines)
 87.50.Ln	Linear energy transfer (LET)
 87.50.Nq	Radiation protection (low LET) for diagnostic and therapeutic x-ray energies
 87.50.Pr	Radiation protection (high LET)

 87.51.+e	Biological effects of sound and ultrasound; lithotripsy

 87.53.-j	Ionizing-radiation therapy physics
 87.53.Bn	Photon dosimetry: theory and algorithms
 87.53.Dq	Photon dosimetry: measurements
 87.53.Fs	Electron and positron dosimetry: theory and algorithms
 87.53.Hv	Electron and positron dosimetry: measurements
 87.53.Jw	Brachytherapy dosimetry: theory, algorithms, and measurements
 87.53.Ly	Stereotactic radiosurgery dosimetry: theory, algorithms, and measurements
 87.53.Na	Radioimmunotherapy dosimetry: theory, algorithms, and measurements
 87.53.Pb	Proton, neutron, and heavier particle dosimetry: theory and algorithms
 87.53.Qc	Proton, neutron, and heavier particle dosimetry: measurements
 87.53.Rd	Microdosimetry
 87.53.Tf	Treatment planning: algorithms, collimation, verification of alignment, optimization, quality assurance specifications, tissue response factors (TCP and NTCP), etc.

 87.54.-n	Non-ionizing radiation therapy physics
 87.54.Br	Thermotherapy (hyperthermia and cryogenic therapy)
 87.54.Dt	Electrotherapy

 87.56.-v	Radiation therapy equipment
 87.56.By	Radiation generators
 87.56.Da	Ancillary equipment
 87.56.Fc	Quality assurance equipment

 87.59.-e	Medical imaging
 87.59.Bh	X-ray radiography
 87.59.Ci	Fluoroscopy
 87.59.Dj	Angiography
 87.59.Ek	Mammography
 87.59.Fm	Computed tomography (CT)
 87.59.Hp	Digital radiography
 87.59.Jq	Transmission imaging
 87.59.Ls	Bone densitometry
 87.59.Mt	Ultrasonography
 87.59.Pw	Magnetic resonance imaging (MRI)
 87.59.Qx	Nuclear medicine imaging, dosimetry, labeling and metabolic studies; radiopharmaceuticals
 87.59.Sz	Quantitative scanning
 87.59.Ta	Single-photon emission computed-tomography (SPECT)
 87.59.Vb	Positron emission tomography (PET)
 87.59.Wc	Thermography, visible radiation imaging, and other imaging and diagnostic techniques.

 87.62.+n	Medical imaging equipment

 87.64.-t	Spectroscopic and microscopic techniques in biophysics and medical physics (for spectrometers, see 07.57.P, 07.57.T, 07.60.R, 07.75 and 07.85.N)
 87.64.Bx	Electron, neutron and x-ray diffraction and scattering
 87.64.Dz	Electron microscopy; scanning tunneling and atomic force microscopy
 87.64.Fb	X-ray spectroscopy, EXAFS
 87.64.Hd	EPR and NMR spectroscopy
 87.64.Je	Infrared and Raman spectroscopy
 87.64.Lg	Electron and photoelectron spectroscopy
 87.64.Ni	Optical absorption, magnetic circular dichroism, and fluorescence spectroscopy
 87.64.Pj	Mössbauer spectroscopy

 87.65.+y	Aerospace bio- and medical physics (effects of accelerations, weightlessness, and space environment)

 87.80.+s	Biophysical instrumentation and techniques

 87.90.+y	Other topics in biophysics and medical physics

 89.	Other areas of research of general interest to physicists

 89.20.+a	Industrial and technological research and development

 89.30.+f	Energy resources

 89.40.+k	Transportation

 89.50.+r	Urban planning and development

 89.60.+x	Environmental and ecological studies

 89.70.+c	Information science (for quantum information, see 03.67)

 89.80.+h	Computer science and technology

 89.90.+n	Other areas of general interest to physicists