Supernovae represent the last stage of stellar evolution. They are responsible for the majority of the heavy elements in the universe, are sites of particle acceleration, and are the birth places for neutron stars and black holes. The supernova group at Stockholm Observatory continues to become heavily involved in various observational projects on supernovae. Observations have concentrated on those obtained with the HST in connection with the Supernova INtensive Studies (SINS) collaboration, and the STIS instrumental team at Goddard Space Flight Center. The large data base gathered by IUE has also continued to be analyzed. SN 1987A was also observed with ISO in 1998, and a substantial amount of ground-based data have been gathered using telescopes at ESO, La Silla and with NOT. Much of the group's efforts have been to model these and other observations. The research has during 1997-1998 focused mainly on SNe 1987A, 1993J, 1994W, 1995N, 1996N and 1998S, but has ventured into other areas as well.