Symbolic reduction of block diagrams using FORMAC
Carl F. Lorenzo, P. Swigert · NASA Technical Reports Server (NASA) · 1968
Two computer programs - one written in FORMAC to generate the desired symbolic expressions, the other in FORTRAN 4 to numerically evaluate the expressions are announced. The FORTRAN program accepts the symbolic punched output from the FORMAC program in either unexpanded or expanded form. It numerically evaluates the expressions.