A user of an application system specifiex a particular problem as input to the system. The possible inputs form a language, and a family of application systems can be characterized by a family of languages. Such a family of languages is presented, and it is sketched how a particular application system may be obtained by extensions to a skeleton interpreter. The family of languages, and the language used for the skeleton interpreter, are based on a statement-oriented approach to data abstraction. This means that data abstraction concepts will be common to the users of a system and the system programmer.

--Author’s Abstract

The system as described appears straighforward for system designers to use, although the examples are necessarily so short that it is difficult to get a feeling for the size or complexity of a system for an interesting application. No data are given on size or speed of the base system or of applications built using it. The author states: “Since the integers are the only elementary data that can be handled much has yet to be done.” It is to be hoped that the author can produce another paper when more of it has been done.