Acknowledgements

        The research embodied in CRYPTOS is the result of years of cooperat-
ive research supported by members of the timber industry. Financial 
contributions from Arcata Redwood Company, Georgia-Pacific Corporation, Hard-
wood Lumber Company, Louisanna-Pacific Company, Simonson Lumber Company and
Simpson Timber Company were joined with University supported and McIntire-
Stennis forestry research funds to form the financial base for this work. In
kind support was also provided by California's Jackson State Demonstration
Forest. Representatives of these companies contributed their time and 
expertise to the planning efforts as well as assisted in the collection of 
the necessary research data from their respective properties.

        Special leadership was provided by Jere Melo in getting the cooperat-
ive effort launched and by Ken Stumpf in acting as the industry coordinator.
Special recognition is also give to Bruce Krumland, who was employed full or
part time on the project from 1974 through 1982. The dedication that Bruce
showed toward this effort was responsible for the first version of the 
simulator and his recommendations were useful in producing the current 
version as well. Ed Murphy, Keitlyn Waltson, John Jue, Joel Dye, and others 
contributed to various aspects of the research upon which the estimates are
based. Peter Daugherty is recognized for his efforts in revising the original
CRYPTOS program to make a simulator for the Northern California Forest Yield
Cooperative (CACTOS), to Vaughan Landrum who helped to revise CACTOS to 
produce the current version of CRYPTOS, and to Walter Meerschaert who is 
currently responsible for maintaining the program code.

         This truly cooperative effort has benefited from the review comments 
of numerous individuals within the cooperative and without. Among the outside 
reviewers that must be mentioned are David Bruce, Bob Curtis, and Bob 
Monserud. Among the inside reviewers special thanks is given to Greg Biging,
my valued colleague, for his tireless efforts in reviewing both research
results and propsed manuscripts. To all I express my personal gratitude and
thanks. However, I alone take responsibsility for any errors in CRYPTOS. 
Therefore, please address all suggestions to me.

        Last, but not least, I'd like to recognize the contributions of Pete
Passof, Rick Standiford, Gray Nakamura, and John LeBlanc for their support 
and for the efforts that they have given toward making CRYPTOS available to
the users. Their short courses and individualized instruction have assisted
hundreds of users.