Abstract:This paper presents computer general expressions which include: (1) calculation of the coefficient of normal equation; (2) calculation of the reduced coefficient; (3)calculation of [PVV]; (4)calculation of the correlate; (5) calculation of the weighted reciprocal(1/PF) of the function of adjusted value. Each calculation is written in a corresponding program. As a program block, it may be called anywhere in the course of surveying computation.