Part 1 Gravitational waves - theory: calculating gravitational waveforms, by any means necessary!, S.L. Shapiro; gravitational theories and observations, L. Grishchuk. Part 2 Sources of gravitational waves: neutron stars and the population of collapsed objects in the galaxy, F. Pacini; supernova rates, C. Chiosi. Part 3 Numerical relativity: gravitational collapse and radiation, J.-A. Marck; gravitational waves from magnetized neutron stars, E. Gourgoulhon. Part 4 Interferometric detectors: status of VIRGO, A. Giazotto; status of LIGO, M. Coles. Part 5 Cosmology: string cosmology and relic gravitational radiation, G. Veneziano; spectrum of cosmic gravitational waves background from string cosmology, R. Brustein. Part 6 Resonant bars: the cryogenic gravitational wave antennas explorer and Nautilus, G.V. Pallottino; the ultracryogenic gravitational wave detector AURIGA, G.A. Prodi. Part 7 Detector networks: interferometer-bar systems, B.F. Schutz; arrays of detectors, S. Frasca. Part 8 Experimental perspectives: sphere detector for coalescing binaries, E. Coccia; sapphire test masses for laser interferometric gravitational wave detectors - achievable parameters, D.G. Blair. Part 9 Astrophysics: gravitational waves from rotating neutron stars, S. Bonazzola; gravitational waves and pulsating stars - what can we learn from future observations?, K. Kokkotas. Part 10 Data analysis: data analysis for laser interferometry, M. Tinto; data analysis for resonant gravitational wave antennas with fully numerical processing - optimal filtering, signal timing, rejection of spuria and correlation analysis, S. Vitale. Part 11 Data analysis: on-line system and data archiving of VIRGO, F. Barone; interferometer simulation, F. Cavalier. Part 12 Experimental prototypes: low temperature measurements on spherical CuAl and CuBe samples, G. Frossati; eigenfrequencies and quality factors of vibration of aluminium alloy spherical resonators, V. Fafone. Part 13 Theoretical issues: inspiralling compact binaries, L. Blanchet. Part 14 Detection in space: spacecraft Dopplier tracking, L. Iess; laser interferometry in space, P. Bender; and other papers.