Precision measurement is of crucial importance for the progress of science and technology. This is the second subvolume of the series to deal with the significance of fundamental constants, focusing on the status of their determination.

Contributions by: H. Bachmair, W.R. Blevin, L. Bliek, E. Braun, E.R. Cohen, T.W. Hänsch, W.F. Koch, B. Kramer, D.H. McIntyre, W. Michaelis, Y.C. Ni, J. Niemeyer, B.W. Petley, B.N. Taylor, A.H. Wapstra, C.O. Weiss, K. Weyand, G.D. Willenberg, W. Wöger