The third book in the Coad/Yourdon series on object-oriented programming, this volume uses a series of four comprehensive examples to help readers gradually and gently flip their system-building mind-set into an object-oriented perspective -- how to "object think" and program with the two leading object-oriented programing languages -- Smalltalk and C++. Contains an OOPL primer, major examples, language summaries, OO patterns, and extensive source code for the major examples. For programmers.