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INTERORD, a computer-interactive FORTRAN IV program for developing simple orders on a set of objects, is described. INTERORD executes in the interactive mode by presenting pairs to be judged at a remote terminal. The respondent at the terminal judges which one of the objects dominates the other. INTERORD utilizes the observed dominance relations to determine which additional relations are implied by the transitivity principle. Since pairs not implied are presented for judgment, a substantial reduction occurs in the number of judgments required in the pair comparisons procedure.

INTERSCAL is a program for subject-computer interactive multidimensional scaling. The program analyzes subsets of judgments of similarity as they are given and picks out dimension-defining stimuli; this capability allows for a great reduction in the number of judgments. Program features and options are described.

TAILOR, a FORTRAN program for tailored testing, is described. The procedure for a joint ordering of persons and items with no pretesting as the basis for the tailored test is given, and a brief discussion of the computer program is included.