The article considers the use of the procedure mechanism with procedure type parameters in modular organization of programs and program systems. Descriptions of modules realizing various types of abstractions with the aid of this mechanism are demonstrated. The notion of a mixed abstraction is introduced and a method of its realization by the procedure mechanism is proposed.
Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova AN SSSR, Vol. 111, pp. 5–30, 1981