Observational and Theoretical Issues of Interacting Binaries was the
topic of the 22nd Advanced Course of the Swiss Society for Astrophysics
and Astronomy. It was the first time that binary systems were the center
of attention of our course. The established concept and organisation of
the Advanced Course has been retained: three scientists, all
acknowledged experts in their respective fields, were each invited to
give nine one-hour lectures within the period of a week. The Advanced
Course took place from April 6 to 11, 1992, at Les Diablerets, a
charming resort in the Swiss alps. The high level of the lectures, the
international background of the 65 participants, including many young
students, and the beauty of the surroundings all contributed to the
success of the course. The lecture notes of this course, the 22nd in our
series, are also the third to be published by Springer-Verlag. Well over
half of all stars seem to exist in binary systems. The study of binary
evolution is therefore essential for our understanding of stellar
evolution in general. The evolution of interacting binaries contains in
itself many of the problems met in other fields of modern astrophysics.
This is very apparent in these lecture notes.