options as the supporting programs for these options are not yet released. When they are released supplemental users manuals will detail their operation. REFERENCES 1. Bowers, Wendell. "Cost of Owning and Operating Farm Machinery." Bulletin AENG-87. Cooperative Extension Service and University of Illinois, Urbana. 1966. 2. Kletke, Darrel D. "Operation of the Enterprise Budget Generator." Research Report Pv790. Oklahoma State University, Stillwater. August, 1979. 3. Walker, Rodney L. and Darrel D. Kletke. "User's Manual Oklahoma State University Crop Budget Generator." Progress Report P-656, Oklahoma State University, Stillwater. November, 1971 (Revised October, 1972).