space motions # proper motions and radial velocities (line-of-sight velocities);    97.10.Wn  
space research instruments, apparatus, and components (satellites, space vehicles, etc.) # spaceborne and    07.87.+v  
space vehicles, etc.) # spaceborne and space research instruments, apparatus, and components (satellites,    07.87.+v  
space-based ultraviolet, optical, and infrared telescopes   95.55.Fw  
space-charge effects # dielectric breakdown and    77.22.Jp  
space-charge-dominated beams   52.59.Sa  
space-charge-limited devices, and Gunn effect devices) # bulk semiconductor and conductivity oscillation devices (including Hall effect devices,    85.30.Fg  
space-plasma and astrophysical-plasma processes # laboratory studies of    52.72.+v  
space-research instrumentation # astronomical and    95.55.-n  
spaceborne and space research instruments, apparatus, and components (satellites, space vehicles, etc.)   07.87.+v  
spaces # several complex variables and analytic    02.30.Fn  
spacetime # quantum field theory in curved    04.62.+v  
spacetime # self-gravitating systems; continuous media and classical fields in curved    04.40.-b  
spacetime topology, causal structure, spinor structure   04.20.Gz  
spacetimes with fluids, radiation or classical fields # Einstein - Maxwell spacetimes,    04.40.Nr  
spacetimes, spacetimes with fluids, radiation or classical fields # Einstein - Maxwell    04.40.Nr  
spallation reactions   25.40.Sc  
spark gaps) # plasma switches (e.g.,    52.75.Kq  
sparks; lightning; atmospheric electricity (see also 92.60.Pw in hydrospheric and atomospheric geophysics) # arcs;    52.80.Mg  
spatial dimensions (e.g., position, lengths, volume, angles, displacements)   06.30.Bp  
spatial distribution of galaxies # distances, redshifts, radial velocities;    98.62.Py  
spatial pattern formation # beam characteristics: profile,intensity, and power;    42.60.Jf  
spatial patterns in surface reactions # temporal and    82.40.Np  
spatial variations attributed to sea floor spreading   91.25.Jc  
spatial variations: all harmonics and anomalies   91.25.Ga  
spatio-temporal dynamics # dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical    42.65.Sf  
spatiotemporal pattern formation in cellular populations   87.18.Hf  
special classical field theories, # other    03.50.Kk  
special functions   02.30.Gp  
special regimes and techniques # chemical kinetics and reactions:    82.40.-g  
special relativity   03.30.+p  
special relativity # quantum mechanics, field theories, and    03.  
species # impurity and defect levels; energy states of adsorbed    73.20.Hb  
specific calculations   12.20.Ds  
specific chemical reactions; reaction mechanisms   82.30.-b  
specific crystalline solids # structure of    61.66.-f  
specific geometries, flow in narrow channels # hydrodynamics in    67.40.Hf  
specific heats, short-range order # critical-point effects,    75.40.-s  
specific kinds of plasmas # basic studies of    52.27.-h  
specific laser systems # design of    42.60.By  
specific liquid structures # studies of    61.25.-f  
specific magnetic materials # studies of    75.50.-y  
specific materials # conductivity of    72.80.-r  
specific materials # radiation effects on    61.82.-d  
specific materials: fabrication, treatment, testing and analysis   81.05.-t  
specific nuclei listed by mass ranges (an additional heading must be chosen with these entries, where the given mass number limits are, to some degree, arbitrary) # properties of    27.  
specific particles # properties of    14.  
specific phase transitions   64.70.-p  
specific processes # applications of electroweak models to    12.15.Ji  
specific reactions # nuclear reactions:    25.  
specific reactions # other topics in nuclear reactions:    25.90.+k  
specific reactions and phenomenology   13.  
specific reactions and phenomenology of elementary particles # other topics in    13.90.+i  
specific states # inelastic electron scattering to    25.30.Dh  
specific substances # equations of state of    64.30.+t  
specific theories and interaction models; particle systematics   12.  
specific thin films # optical properties of    78.66.-w  
speckle and moire patterns   42.30.Ms  
SPECT) # single photon emission computed tomography (   87.58.Ce  
spectra # atomic    32.30.-r  
spectra # electronic structure and    36.20.Kd  
spectra # fluorescence and phosphorescence    33.50.Dq  
spectra # infrared    33.20.Ea  
spectra # infrared and Raman    78.30.-j  
spectra # intrinsic properties of excitons; optical absorption    71.35.Cc  
spectra # magnetic resonance    32.30.Dx  
spectra # mass    33.15.Ta  
spectra # Moessbauer    33.45.+x  
spectra # molecular    33.20.-t  
spectra # optical activity and dichroism; magnetooptical and electrooptical    33.55.-b  
spectra # photoelectron    33.60.-q  
spectra # photoemission and photoelectron    79.60.-i  
spectra # radio-frequency and microwave    33.20.Bx  
spectra # radio-frequency, microwave, and infrared    32.30.Bv  
spectra # ultraviolet    33.20.Lg  
spectra # ultraviolet and vacuum ultraviolet photoelectron    33.60.Cv  
spectra # vacuum ultraviolet    33.20.Ni  
spectra # vibrational and rotational structure, infrared and Raman    36.20.Ng  
spectra # visible    33.20.Kf  
spectra # visible and ultraviolet    32.30.Jc  
spectra # x-ray    32.30.Rj  
spectra # x-ray    33.20.Rm  
spectra # x-ray absorption    78.70.Dm  
spectra # x-ray photoelectron    33.60.Fy  
spectra (including optical scattering) # Raman and Rayleigh    33.20.Fb  
spectra - in atomic and molecular physics) # Moessbauer effect; other y-ray spectroscopy (see also 33.45.+x Moessbauer    76.80.+y  
spectra and fluorescence # x-ray emission    78.70.En  
spectra and sputtering) # impact phenomena (including electron    79.20.-m  
spectra, abundances, and isotopes # atomic masses, mass    32.10.Bi  
spectra, and interactions # composition, energy    96.40.De  
spectra, and spectral parameters (opacities, rotation constants, line identification, oscillator strengths, gf values, transition probabilities, etc.) # atomic and molecular data,    95.30.Ky  
spectra, photodissociation, and photoionization; luminescence   87.15.Mi  
spectra: visible and ultraviolet # absorption and reflection    78.40.-q  
spectra; predissociation, photodissociation # diffuse    33.80.Gj  
spectra; time-temperature superposition, etc.) # data analysis (interconversion of data computation of relaxation and retardation    83.85.Ns  
spectral absorption by atmospheric gases   42.68.Ca  
spectral classification # luminosities; magnitudes; effective temperatures, colors, and    97.10.Ri  
spectral lines # intensities and shapes of atomic    32.70.-n  
spectral lines and bands # intensities and shapes of molecular    33.70.-w  
spectral methods   02.70.Hm  
spectral parameters (opacities, rotation constants, line identification, oscillator strengths, gf values, transition probabilities, etc.) # atomic and molecular data, spectra, and    95.30.Ky  
spectral sources (including inductively coupled plasma) # discharges for    52.80.Yr  
spectro-analytical methods (e.g., photoacoustic, photothermal, and optogalvanic spectroscopic methods) # energy-conversion    82.80.Kq  
spectrometers # electron AND ion    07.81.+a  
spectrometers # mass    07.75.+h  
spectrometers # visible and ultraviolet    07.60.Rd  
spectrometers # x-ray and gamma-ray    07.85.Nc  
spectrometers and spectroscopic techniques   29.30.-h  
spectrometers, auxiliary equipment, and techniques # infrared    07.57.Ty  
spectrometers, auxiliary equipment, and techniques # submillimeter wave, microwave and radiowave spectrometers; magnetic resonance    07.57.Pt  
spectrometers: electric and magnetic # charged-particle    29.30.Aj  
spectrometers; and other instrumentation and techniques # gravitational radiation detectors; mass    95.55.Ym  
spectrometers; magnetic resonance spectrometers, auxiliary equipment, and techniques # submillimeter wave, microwave and radiowave    07.57.Pt  
spectrometry # Fourier transform mass    82.80.Nj  
spectrometry # ion cyclotron resonance mass    82.80.Qx  
spectrometry # time of flight mass    82.80.Rt  
spectrometry (including SIMS, multiphoton ionization and resonance ionization mass s pectrometry, MALDI) # mass    82.80.Ms  
spectrophotometry # spectroscopy and    95.75.Fg  
spectroscopic analysis methods # x-ray, Moessbauer, and other gamma-ray    82.80.Ej  
spectroscopic and microscopic techniques in biophysics and medical physics   87.64.-t  
spectroscopic binaries; close binaries   97.80.Fk  
spectroscopic detection; coronographic detection; interferometric detection # photometric and    97.82.Cp  
spectroscopic factors   21.10.Jx  
spectroscopic instrumentation # photometric, polarimetric, and    95.55.Qf  
spectroscopic methods) # energy-conversion spectro-analytical methods (e.g., photoacoustic, photothermal, and optogalvanic    82.80.Kq  
spectroscopic techniques   39.30.+w  
spectroscopic techniques # spectrometers and    29.30.-h  
spectroscopies and other ultrafast optical measurements in condensed matter # time-resolved optical    78.47.+p  
spectroscopy # analytical methods involving electronic    82.80.Dx  
spectroscopy # analytical methods involving rotational    82.80.Ha  
spectroscopy # analytical methods involving vibrational    82.80.Gk  
spectroscopy # charged-particle    29.30.Ep  
spectroscopy # electron    29.30.Dn  
spectroscopy # electron and photoelectron    87.64.Lg  
spectroscopy # electron energy loss    79.20.Uv  
spectroscopy # EPR and NMR    87.64.Hd  
spectroscopy # EXAFS    87.64.Fb  
spectroscopy # infrared and Raman    87.64.Je  
spectroscopy # laser    42.62.Fi  
spectroscopy # magnetic resonance techniques; Moessbauer    61.18.Fs  
spectroscopy # Moessbauer    87.64.Pj  
spectroscopy # near-field scanning microscopy and    68.37.Uv  
spectroscopy # neutron    29.30.Hs  
spectroscopy # optical absorption, magnetic circular dichroism, and fluorescence    87.64.Ni  
spectroscopy # other topics in radioactive decay and in-beam    23.90.+w  
spectroscopy # radioactive decay and in-beam    23.  
spectroscopy # x-ray and gamma-ray    29.30.Kv  
spectroscopy (AES), etc.) # electron spectroscopy (x-ray photoelectron (XPS), Auger electron    82.80.Pv  
spectroscopy (see also 33.45.+x Moessbauer spectra - in atomic and molecular physics) # Moessbauer effect; other y-ray    76.80.+y  
spectroscopy (x-ray photoelectron (XPS), Auger electron spectroscopy (AES), etc.) # electron    82.80.Pv  
spectroscopy and geometrical structure of clusters   36.40.Mr  
spectroscopy and other interactions of particles and radiation with condensed matter # other topics in optical properties, condensed matter    78.90.+t  
spectroscopy and other interactions of radiation and particles with condensed matter # optical properties, condensed-matter    78.  
spectroscopy and spectrophotometry   95.75.Fg  
spectroscopy of atoms and molecules # coherent    82.53.Kp  
spectroscopy: EXAFS, NEXAFS, XANES, etc. # x-ray absorption    61.10.Ht  
spectrum) # seismic sources (mechanisms, magnitude, moment frequency    91.30.Bi  
spectrum-generating symmetries) # nonlinear and dynamical symmetries (   11.30.Na  
speech perception   43.71.+m  
speech processing and communication systems   43.72.+q  
speech production   43.70.+i  
spherical tokamaks # tokamaks,    52.55.Fa  
spheroidal) # dwarf galaxies (elliptical, irregular, and    98.52.Wz  
spheroidal) # dwarf galaxies (elliptical, irregular, and    98.56.Wm  
spheromaks   52.55.Ip  
spicules # chromosphere and chromosphere-corona transition;    96.60.Na  
spin # spin, parity, and isobaric    21.10.Hw  
spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)   75.25.+z  
spin dependence of cross sections; polarized electron beam experiments   34.80.Nz  
spin diffusion, dynamic scaling, etc.) # dynamic properties (dynamic susceptibility, spin waves,    75.40.Gb  
spin dynamics   67.57.Lm  
spin echoes   76.60.Lz  
spin glasses and other random magnets   75.50.Lk  
spin Hamiltonians # crystal-field theory and    75.10.Dg  
spin interactions # vibronic, rovibronic, and rotation-electron-   33.20.Wr  
spin models # classical    75.10.Hk  
spin models # quantized    75.10.Jm  
spin polarized carriers # electrical injection of    72.25.Hg  
spin polarized carriers # optical creation of    72.25.Fe  
spin polarized field effect transistors   85.75.Hh  
spin polarized resonant tunnel junctions   85.75.Mm  
spin polarized transport   72.25.-b  
spin polarized transport # magnetic field sensors using    85.75.Ss  
spin polarized transport in metals   72.25.Ba  
spin polarized transport in semiconductors   72.25.Dc  
spin polarized transport or integrated magnetic fields # magnetoelectronics: devices exploiting    85.75.-d  
spin pumping # current-driven    72.25.Pn  
spin relaxation and scattering   72.25.Rb  
spin rotation and relaxation # muon    76.75.+i  
spin transport through interfaces   72.25.Mk  
spin waves   75.30.Ds  
spin waves, spin diffusion, dynamic scaling, etc.) # dynamic properties (dynamic susceptibility,    75.40.Gb  
spin, parity, and isobaric spin   21.10.Hw  
spin-density waves   75.30.Fv  
spin-glass and other random models   75.10.Nr  
spin-orbit coupling, Zeeman and Stark splitting, Jahn - Teller effect   71.70.Ej  
spin-polarized electron studies, synchrotron-source x-ray scattering, etc.) # spin arrangements in magnetically ordered materials (including neutron and    75.25.+z  
spin-polarized hydrogen and helium   67.65.+z  
spin-wave resonance # ferromagnetic, antiferromagnetic, and ferrimagnetic resonances;    76.50.+g  
spinor structure # spacetime topology, causal structure,    04.20.Gz  
spiral arms and bars; galactic disks   98.62.Hr  
spiral arms and galactic disk   98.35.Hj  
spiral galaxies   98.52.Nr  
spiral galaxies (M31 and M33)   98.56.Ne  
splicing # fabrication, cladding, and    42.81.Bm  
splitters, and deflectors # reflectors, beam    42.79.Fm  
splitting # beam shaping, beam    41.85.Ct  
splitting # strain-induced    71.70.Fk  
splitting and interactions # level    71.70.-d  
splitting, Jahn - Teller effect # spin-orbit coupling, Zeeman and Stark    71.70.Ej  
spontaneous and radiative symmetry breaking   11.30.Qc  
spontaneous breaking of gauge symmetries   11.15.Ex  
spontaneous fission   25.85.Ca  
sports # physics of    01.80.+b  
spray coating techniques   81.15.Rs  
spray, arc welding, etc.) # high-pressure, high-current plasmas (plasma    52.77.Fv  
spreading # spatial variations attributed to sea floor    91.25.Jc  
sputtering # deposition by    81.15.Cd  
sputtering) # impact phenomena (including electron spectra and    79.20.-m  
sputtering, mantle growth, etc.) # dust processes (condensation, evaporation,    95.30.Wi  
sputtering, SIMS) # ion scattering from surfaces (charge transfer,    68.49.Sf  
squeezed, antibunched, and sub-Poissonian states; operational definitions of the phase of the field; phase measurements # nonclassical field states;    42.50.Dv  
SQUIDs) # superconducting quantum interference devices (   85.25.Dq  
stability # hydrodynamic    47.20.-k  
stability # resonance, damping and dynamic    46.40.Ff  
stability and fragmentation of clusters   36.40.Qv  
stability of laminar flows   47.15.Fe  
stability, and oscillations # relativistic stars: structure,    04.40.Dg  
stability, gain, and other operational parameters # efficiency,    42.60.Lh  
stability; thermal effects # thermal    68.60.Dv  
stacking faults and other planar or extended defects   61.72.Nn  
stages of stellar evolution (including black holes) # late    97.60.-s  
standard model see also 12.10.-g unified field theories and models # models beyond the    12.60.-i  
standard-model Higgs bosons   14.80.Bn  
standards # auxiliary and recording instruments; clocks and frequency    95.55.Sh  
standards # optical sources and    42.72.-g  
standards # units and    06.20.Fn  
standing waves # x-ray    68.49.Uv  
star counts, distribution, and statistics   97.10.Yp  
star formation   97.10.Bt  
star formation # origin, formation, evolution, age, and    98.35.Ac  
star formation # origin, formation, evolution, age, and    98.62.Ai  
starburst galaxies and infraredexcess galaxies   98.54.Ep  
Stark effects # Zeeman and    32.60.+i  
Stark effects # Zeeman and    33.55.Be  
stark shift # strong-field excitation of optical transitions in quantum systems; multi-photon processes; dynamic    42.50.Hz  
Stark splitting, Jahn - Teller effect # spin-orbit coupling, Zeeman and    71.70.Ej  
starlight # magnetic and electric fields; polarization of    97.10.Ld  
stars   97.  
stars # binary and multiple    97.80.-d  
stars # cataclysmic binaries (novae, dwarf novae, recurrent novae, and nova-like objects); symbiotic    97.80.Gm  
stars # giant and subgiant    97.20.Li  
stars # multiple    97.80.Kq  
stars # neutron    97.60.Jd  
stars # nuclear matter aspects of neutron    26.60.+c  
stars # other topics on    97.90.+j  
stars # population III    97.20.Wt  
stars # supergiant    97.20.Pm  
stars (A and F) # main-sequence: intermediate-type    97.20.Ge  
stars (Ap, Am, etc.) # chemically peculiar    97.30.Fi  
stars (by class): general or individual # normal    97.20.-w  
stars (G, K, and M) # main-sequence: late-type    97.20.Jg  
stars (horizontal branch, metal poor, etc.) # population II    97.20.Tr  
stars (including blue stragglers), white dwarfs, degenerate stars, nuclei of planetary nebulae # faint blue    97.20.Rp  
stars (including novae) # variable and peculiar    97.30.-b  
stars (O and B) # main-sequence: early-type    97.20.Ec  
stars (OB, T, R) in external galaxies # associations of    98.20.Bg  
stars (OB, T, R) in the Milky_Way # associations of    98.20.Af  
stars (Of, Be, Luminous Blue Variables, Wolf - Rayet, etc.) # emission-line    97.30.Eh  
stars (UV Ceti, RS Canum Venaticorum, FU Orionis, R Coronae Borealis variables, etc.) # flare    97.30.Nr  
stars, and related types (C, S, R, and N) # carbon stars, S    97.30.Hk  
stars, nuclei of planetary nebulae # faint blue stars (including blue stragglers), white dwarfs, degenerate    97.20.Rp  
stars, Orion population, Herbig-Haro objects, Bok globules, bipolar outflows, cometary nebulae, etc.) # pre-main sequence objects, young stellar objects (YSO's) and protostars (T Tauri    97.21.+a  
stars, S stars, and related types (C, S, R, and N) # carbon    97.30.Hk  
stars, subdwarfs, and brown dwarfs # low luminosity    97.20.Vs  
stars: structure, stability, and oscillations # relativistic    04.40.Dg  
stars; RV Tauri and PV telescopii variables # RR Lyrae    97.30.Kn  
starspots) # surface features (including    97.10.Qh  
state # crystalline    61.50.-f  
state # electron correlation calculations for atoms and ions: ground    31.25.Eb  
state # equations of    91.60.Fe  
state # thermodynamic functions and equations of    05.70.Ce  
state # thermodynamic processes, conduction, convection, equations of    95.30.Tg  
state # thermodynamic properties, equations of    51.30.+i  
state and phase equilibria # general theory of equations of    64.10.+h  
state chemistry # solid    82.33.Pt  
state detectors # solid    87.66.Pm  
state energy transfer # state to    82.20.Rp  
state lasers # doped-insulator lasers and other solid    42.55.Rz  
state mixing, etc.) # electronic excitation and ionization of molecules; intermediate molecular states (including lifetimes,    34.50.Gb  
state of specific substances # equations of    64.30.+t  
state reconstruction, quantum tomography   03.65.Wj  
state scattering analyses # state-to-   34.50.Pi