T his research has been done in o rd e r to nıaterialize a Computer softw are which provides an opportunity to m ake stem analyses in Computer environm ent th a t a re used in the determ ination of the grovvth relationships of single trees. V olüm e calcu latio n s of in d iv id u al trees in resp ect to section m ethod an d increm ent percent calculations in respect to Pressler, Breym aıın I-H and Leibnitz form ulas in the p ro g ram can be p erfo raıed . Two different form s as absolute ao d relative graphs of the age-height an d stem m odeî g rap h s in program can be draw n. The age-height graph can be aiso draw n in respect to five statistical polinom inal m odels in ad d itio n to in te rp o la tio n m ethod. C o rreîatio n an d regression analyses of the statistical m odel used fo r draw in g th e age-height g rap h are c a rried out. Besides, coefficents a n d statistics of the m odeîs are com puted as well. Volume and increm ent calculations an d diam eter decrease, diam eter ratia, plum pness coefficents and stem form coefficent a t breast height used for the num erica! definition of individııai trees can be com puted according to age periods. Results of the tfaese values can be talcen in tables from Computer m onitor or printer. The amounts of the kinds of wood products for an individual tree a re obtained in age periods.