Since this book was first published in 1985, tremendous changes have taken place in the field of online searching. Thus a second edition was truely over- due. Dr. Hedda Schulz, author of the first edition, found a most competent and renowned searcher as her co-author in the person of Dr. Ursula Georgy. The authors have undertaken an enormous task. As a result of their efforts, a convincing handbook had been written. It will reliably serve newcomers and experts alike it is an instruction manual as well as a reference book. The importance of modem information handling has been advanced in many an article, book and preface. It is therefore unnecessary to repeat the arguments here. This book can contribute to creating a deeper understanding of information handling in those persons who have not yet registered its impor- tance or who are standing on the sidelines waiting sceptically. In contrast, all those people who have so far believed that you only need to connect your personal computer to a modem will be shown in a thoroughly professional way that there is a lot more to online searching than pressing keys on your keyboard. To own a palette and easel does not make you an artist. Apart from the benefit, that searchers and readers will draw from it, this book should help to eradicate the timeworn motto: the world's knowledge at your fingertips.