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CADPAC, the Cambridge Analytic Derivatives Package, is a suite of programs for ab initiocomputational chemistry calculations. It has been developed by R. D. Amos with contributions from I. L. Alberts, J. S. Andrews, S. M. Colwell, N. C. Handy, D. Jayatilaka, P. J. Knowles, R. Kobayashi, K. E. Laidig, G. Laming, A. M. Lee, P. E. Maslen, C. W. Murray, J. E. Rice, E. D. Simandiras, A. J. Stone, M.-D. Su and D. J. Tozer. at the University of Cambridge since 1981. It is capable of molecular Hartree–Fock calculations, Møller–Plesset calculations, various other correlated calculations and density functional theory calculations.
