October 1971 - Vol. 14 No. 10
Features
Toward an understanding of data structures
This paper presents a notation and formalism for describing the semantics of data structures. This is based on directed graphs with named edges and transformations on…
Clarification of Fortran standards—second report
In 1966, after four years of effort, Fortran became the first programming language standardized in the United States. Since that initial achievement, study and…
Experiments with an automated instructional system for numerical methods
A comer system was developed at Purdue University to teach portions of an undergraduate course in numerical methods. Each instructional unit or lesson is divided into…
Although the use of structured display files is widespread in interactive computer graphics, these structures present a number of problems which tend to restrict their…
User program measurement in a time-shared environment
A general discussion of the measurement of software systems is followed by a description of a hardware and software scheme for measuring user programs in a time-shared…
Concurrent control with “readers” and “writers”
The problem of the mutual exclusion of several independent processes from simultaneous access to a “critical section” is discussed for the case where there…