NeXTSTEP is the central software of the NeXT workstation. It combines object-oriented programming tools, interface customizing utilities, a multitasking Unix operating system, built-in networking, multimedia connections and Display Postscript for showing on the screen exactly what will be printed out on paper. It makes programming faster and smoother than on other systems platforms. It is so unique, that NeXT Computer, Inc., will be making the 3.0 Version of this software available for users working on other platforms, specifically the Intel 486 PC machines, thereby enormously broadening the potential usership for NeXTSTEP. The book by Garfinkel and Mahoney will be the first comprehensive work dealing with the 3.0 Version of the NeXTSTEP in the context of writing programming applications with it. Garfinkel, an experienced author and Senior Editor of NeXTWORLD magazine, has joined forces with an experienced computer scientist and NeXT User Program Director, Mahoney, to create this authoritative, hands on work for all NeXT users and developers desiring to program in this object-oriented environment.