Preface. Introduction. 1. SQUID Fundamentals; J. Clarke. 2. Advanced SQUID Read-Out Electronics; D. Drung. 3. SQUID Gradiometers in Real Environments; J. Vrba. DC SQUIDs: Design, Optimization and Practical Applications; R. Cantor. 5. Fabrication of High-Temperature SQUID Magnetometers; A.I. Braginski. 6. Pulse Tube Refrigerators: A Cooling Option for High-Cc SQUIDs; C. Heiden. 7. High-Resolution Magnetic Imaging: Cellular Action Currents and Other Applications; J.P. Wikswo, Jr. 8. The Volume Conductor Problem in Biomagnetism; M.J. Peters, et al. 9. Magnetocardiography, an Introduction; S.N. Erné, J. Lehmann. 10. Magnetocardiographic and Electrocardiographic Mapping Studies; G. Stroink, et al. 11. Neuromagnetism and Its Clinical Applications; G.L. Romani, et al. 12. Integrating Competing Technologies with MEG; M.C. Gilardi, et al. 13. Superconducting Magnetic Gradiometers for Mobile Applications with an Emphasis on Ordnance Detection; T.R. Clem, et al. 14. Superconducting Accelerometers, Gravitational-Wave Transducers, and Gravity Gradiometers; H.J. Paik. 15. The Use of SQUIDs for Nondestructive Evaluation; G.B. Donaldson, et al. 16. The Magnetic Inverse Problem for NDE; J.P. Wikswo, Jr. Index. Glossary of Abbreviations and Acronyms.