The PEEK measurement program
James L. Elshoff · ACM SIGMETRICS Performance Evaluation Review · 1984
A computer program called PEEK has been written to measure PL/I computer programs. The PEEK system makes three types of measurements of PL/I programs. PEEK measures (1) basic statistics, (2) cyclomatic complexity, and (3) software science metrics. Each of these types of measures gives a different insight into the nature of the particular computer program that is measured. The PEEK program has been developed as the central tool for doing a set of experiments in program measurement. Future versions of PEEK may be tailored as tools for developing and maintaining computer programs.