Hi, Thanks for downloading AtoB. You should now have an archive (atob.sit) containing 17 files. This is in a stuffed format and can be unstuffed with StuffIt Lite (http://www.aladdinsys.com/stuffitlite/index.html). The files are: FORTRAN files: atob.f; atobp.f INPUT files: ex.atfix; ex.atmix; ex.beadleave; ex.beadmanip; ex.resfix; ex.resmix OUTPUT files: exo.atfix; exo.atmix; exo.beadleave; exo.beadmanip; exo.resfix; exo.resmix CONTROL files: prun; run MANUAL file: manual The best place to start is with the manual file. Best wishes, Olwyn Byron. University of Glasgow. (o.byron@bio.gla.ac.uk)