Contributors: R. Ahdar, F. Ahmed, R. Albert, R. Barker, B.L. Berger, J.E. Buckingham, J. Burnside, P. Dane, J. Harrison, M.A. Helfand, M. Hill, M. Kiviorg, A. Koppelman, I. Leigh, J.L. Neo, Y. Roznai, R. Sandberg, S.D. Smith, P.M. Taylor, H.-M. ten Napel, A.K. Thompson, F. Venter