Deltatalk: An Empirically and Aesthetically Motivated Simplification of the Smalltalk-80 Language -- Reversible Object-Oriented Interpreters -- Using Types and Inheritance in Object-Oriented Languages -- Inheritance and Synchronization in Concurrent OOP -- On Including Part Hierarchies in Object-Oriented Languages, with an Implementation in Smalltalk -- What is “Object-Oriented Programming”? -- Object Representation of Scope During Translation -- Dynamic Grouping in an Object-Oriented Virtual Memory Hierarchy -- Traveler: The Apiary Observatory -- Classification of actions or Inheritance also for methods -- Semantics of Smalltalk-80 -- The Construction of User Interfaces and the Object Paradigm -- The ZOO Metasystem: A Direct-Manipulation Interface to Object-Oriented Knowledge Bases -- The Filter Browser Defining Interfaces Graphically -- The Common Lisp Object System: An Overview -- Concurrency Features for the Trellis/Owl Language -- Objects as Communicating Prolog Units -- An Object Modeling Technique for Conceptual Design -- A Modeller’s Workbench: Experiments in Object-Oriented Simulation Programming -- Behavioral Simulation Based on Knowledge Objects -- Conformance, Genericity, Inheritance and Enhancement -- Inheritance and Subtyping in a Parallel Object-Oriented Language -- On Some Algorithms for Multiple Inheritance in Object Oriented Programming -- FORK: A System for Object- and Rule-Oriented Programming -- Overview of a Parallel Object-Oriented Language CLIX.

In October 1983 an informal meeting was organized in Le Cap d'Agde with the help of the BIGRE bulletin. Sixty people turned out to hear more than ten presentations on object-oriented programming. More important was their unanimous demand for other, more structured encounters. So, about one year later, the Object group was created by AFCET. A second workshop was organized in Brest, and again one year later in Paris, each time showing increased attendance and interest. The success of these meetings and the fact that similar activities were taking place in other European countries, especially Great Britain and Germany, led to the idea of an annual European Conference, providing a forum for theorists and practitioners interested in the object-oriented programming paradigm. It is impossible to acknowledge here all the people and organizations that welcomed with great enthusiasm the birth of the ECOOP conference and contributed to its organization. More than a hundred submissions were received and the program committee had the unpleasant task of turning down many valuable contributions. We hope, however, that the selection of papers for ECOOP'87 emphasizes the fundamental issues and problems of object-oriented programming and will point toward interesting future research directions.