This book is about the advanced, object-oriented NEXTSTEp(TM) user envi- ronment for NeXT and Intel-based computers. It is intended for those who already own a computer running NEXTSTEP and want to quickly learn what it can do and how to get the most out of it with the least effort. It's also for those who are considering the purchase of NEXTSTEP but want to learn more about how it works before making an investment. Why a book on NEXTSTEP? When I set out to learn how to use NEXT- STEP several years ago, I found it extremely difficult to find information from the usual sources, such as books,...