1. Introduction --
2. Quantization of Electric Charge --
3. Circulation and Vortices in Superfluid [superscript 4]He --
4. Superconductivity and Flux Quantization --
5. Josephson Effects --
6. Superfluid [superscript 3]He --
7. The Quantum Hall Effect --
8. Solids and Liquid Crystals --
9. Topological Phase Transitions --
Principles of a Classification of Defects in Ordered Media / G. Toulouse and M. Kleman --
Investigation of Singularities in Superfluid He and Liquid Crystals by Homotopic Topology Methods / G.E. Volovik and V.P. Mineev --
Quantization of Electric Charge --
Quantised Singularities in the Electromagnetic Field / P.A.M. Dirac --
Significance of Electromagnetic Potentials in the Quantum Theory / Y. Aharonov and D. Bohm --
Circulation and Vortices in Superfluid [superscript 4]He --
Nuovo Cimento 6 / L. Onsager --
The Detection of Single Quanta of Circulation in Liquid Helium II / W.F. Vinen --
Evidence for the Creation and Motion of Quantized Vortex Rings in Superfluid Helium / G.W. Rayfield and F. Reif --
Observation of Stationary Vortex Arrays in Rotating Superfluid Helium / E.J. Yarmchuk, M.J.V. Gordan and R.E. Packard --
Transverse Force on a Quantized Vortex in a Superfluid / D.J. Thouless, P. Ao and Q. Niu --
Superconductivity and Flux Quantization --
Theoretical Considerations Concerning Quantized Magnetic Flux in Superconducting Cylinders / N. Byers and C.N. Yang. Experimental Evidence for Quantized Flux in Superconducting Cylinders / B.S. Deaver, Jr. and W.M. Fairbank --
Experimental Proof of Magnetic Flux Quantization in a Superconducting Ring / R. Doll and M. Nabauer --
Flux Quantization in a High-T[subscript c] Superconductor / C.E. Gough, M.S. Colclough and E.M. Forgan --
Josephson Effects --
Possible New Effects in Superconductive Tunnelling / B.D. Josephson --
Quantum Interference from a Static Vector Potential in a Field-Free Region / R.C. Jaklevic, J.J. Lambe and A.H. Silver --
Josephson Currents in Superconducting Tunnelling: The Effect of Microwaves and Other Observations / S. Shapiro --
Comments on Quantum-Electrodynamic Corrections to the Electron Charge in Metals / D.N. Langenberg and J.R. Schrieffer --
High-Precision Test of the Universality of the Josephson Voltage-Frequency Relation / J.S. Tsai, A.K. Jain and J.E. Lukens --
Superfluid [superscript 3]He --
Phase Slippage without Vortex Cores: Vortex Textures in Superfluid [superscript 3]He / P.W. Anderson and G. Toulouse --
NMR Signatures of Topological Objects in Rotating Superfluid [superscript 3]He-A / V.M.H. Ruutu, U. Parts and M. Krusius --
Surface Singularities and Superflow in [superscript 3]He-A / N.D. Mermin --
The Quantum Hall Effect --
New Method for High-Accuracy Determination of the Fine-Structure Constant Based on Quantized Hall Resistance / K. v. Klitzing, G. Dorda and M. Pepper. Direct Comparison of the Quantized Hall Resistance in Gallium Arsenide and Silicon / A. Hartland, K. Jones and J.M. Williams --
Quantized Hall Conductivity in Two Dimensions / R.B. Laughlin --
Quantization of the Hall Conductance for General, Multiparticle Schrodinger Hamiltonians / J.E. Avron and R. Seiler --
Topological Invariant and the Quantization of the Hall Conductance / M. Kohmoto --
Anomalous Quantum Hall Effect: An Incompressible Quantum Fluid with Fractionally Charged Excitations / R.B. Laughlin --
Fractional Quantum Hall Effect and Multiple Aharonov-Bohm Periods / D.J. Thouless and Y. Gefen --
Classification of Abelian Quantum Hall States and Matrix Formulation of Topological Fluids / X.G. Wen and A. Zee --
Solids and Liquid Crystals --
Relationship between Burgers Circuit, Volterra Process and Homotopy Groups / M. Kleman --
Spontaneous Breaking of Euclidean Invariance and Classification of Topologically Stable Defects and Configurations of Crystals and Liquid Crystals / M. Kleman and L. Michel --
The Crossing of Defects in Ordered Media and the Topology of 3-Manifolds / V. Poenaru and G. Toulouse --
Topological Phase Transitions --
Ordering, Metastability and Phase Transitions in Two-Dimensional Systems / J.M. Kosterlitz and D.J. Thouless --
Universal Jump in the Superfluid Density of Two-Dimensional Superfluids / D.R. Nelson and J.M. Kosterlitz --
The Critical Properties of the Two-Dimensional xy Model / J.M. Kosterlitz. Study of the Superfluid Transition in Two-Dimensional [superscript 4]He Films / D.J. Bishop and J.D. Reppy --
Theory of Two-Dimensional Melting / B.I. Halperin and D.R. Nelson --
Possibility of Vortex-AntiVortex Pair Dissociation in Two-Dimensional Superconductors / M.R. Beasley, J.E. Mooij and T.P. Orlando --
Topological Excitations in Two-Dimensional Superconductors / S. Doniach and B.A. Huberman --
Critical-Exponent Measurements of a Two-Dimensional Superconductor / A.F. Hebard and A.T. Fiory --
Melting of Two-Dimensional Vortex Lattices / B.A. Huberman and S. Doniach.

Quantum numbers due to symmetry and topological quantum numbers. Quantization of electric charge. Superconductivity and flux quantization.