Statistical Computations Based Upon Algebraically Specified Models Based upon a machine-readable statistical model and related symbolic specifications, an efficient method of performing calculations for statistical models of a balanced complete nature is presented. Fixes, mixed, and random analysis of variance models are considered. A procedure for obtaining variance components and calculated F statistics for the model terms is included. CACM December, 1966 Schlater, J. E. Hemerle, W. J. CA661206 JB March 2, 1978 2:33 PM 1344 5 1344 1344 5 1344 1344 5 1344