Astronomy and Astrophysics Abstracts appearing twice a year has become one of the fundamental publications in the field of astronomy, astrophysics and neighbouring sciences. It is the most important English-language abstracting journal in the mentioned branches. The abstracts are classified under more than a hundred subject categories, thus permitting a quick survey of the whole extended material. The AAA is a valuable and significant publication for all students and scientists working in the field of astronomy and related sciences. As such it represents a necessary ingredient of any astronomical library all over the world.