Title: ATMSCAT Keywords: High Energy Electron Diffraction, Absorption Computer: Any with F77 compiler Operating System: Any Programming Language: Standard Fortran 77 Hardware Requirements: none Author(s): Q. A. King and D. M. Bird Correspondence Address: School of Physics, University of Bath, Bath BA2 7AY, UK. Email: d.bird@gdr.bath.ac.uk (Internet) Abstract: Atom is a subroutine which when passed the name of an element, the length of a g-vector and a Debye-Waller factor will compute and return both the real and absorptive atomic scattering factors, which can then be incorporated into any existing diffraction program. All the data is self-contained within the subroutine, documentation may be found at the head of the subroutine. ---------------------------------------------------------------------------