Argonne National Laboratory, Building 900, Industrial Technology Development Center, 9700 South Cass Avenue, Argonne, IL 60439

A -- RESEARCH & DEVELOPMENT POC Paul Betten, Licensing Officer (630-252-4962, betten@anl.gov). Automatic Differentiation Software Helps Predict, Optimize, and Model -- Available for Licensing ADIFOR is an exceptional technology developed under a collaboration between Argonne National Laboratory and Rice University encompassing more than 10 years of effort. ADIFOR employs a technique called automatic differentiation (AD) to generate derivative-enhanced versions of programs written in Fortran 77. AD is applicable to a wide variety of scientific and engineering areas. Present applications include: weather prediction, aerospace vehicle optimization, earthquake ground modeling, nonlinear structural analysis, chemical reactor modeling, medical drug modeling, waste site and ground water flow characterization, and hydrodynamic modeling. Ongoing developments include the differentiation of ANSI-C, the computation of higher-order derivatives, and the computation of "adjoints." ADIFOR is available for the following operating systems: AIX, SunOS 4.x and 5.x, HP/UX, IRIX, Linux, and Windows95/NT. ADIFORwas the winner of the 1995 Wilkinson Prize for groundbreaking contributions to numerical computing. ADIFOR is primarily available through a nonexclusive, annually renewable license; however, a perpetual license is also available. Fees for an annually renewable license are determined by the number of central processing units (CPUs) used to generate derivative-enhanced codes. Each annually renewable licensee will receive the following: (1) The ADIFOR 2.0 System, including ADIFOR 2.1 preprocessor (binary), ADIntrinsics 1.5 exception handling package (binary and source), and SparsLinC 1.1 (Sparse Linear Combination) package (binary and source); (2) a standard license agreement, (3) an annual renewal notice every January 1st; and (4) an ADIFOR user's manual. Upgrades, if any, will be made available, as well. The fee schedule for a one-year license and renewals (as of March 1997) is as follows: For 1 CPU, $20,000; for 2-5 CPUs, $5,000 additional per CPU; for 6-14 CPUs, $4,000 additional per CPU, and for unlimited CPUs, $80,000. Because there is an automatic renewal notice every January 1st, the ADIFOR annual license fee will be prorated at 25% per quarter. For the last quarter of the year (October 1-December 31), an option is available to pay only that quarter or add that quarter's payment to next year's full payment. Prices are subject to change without notice. (0283)

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