This directory contains the sources of the programmes necessary for computing the CI analytical gradients in the COLUMBUS programme system. Please mind it is necessary to take this version of the mcscf programme, not the standard version, as the format of the RESTART file is different, and the structure of the formula tape and of the DRT file is also slightly different (it undergoes permanent changes, whenever a new version of COLUMBUS is published :-( ) As far as I know, there are no problems with the new version of the CI DRT and formula tape; but for security, even the working version of the CI programmes is included. Currently, there is no documentation for the CIDEN/BATRA/CIGRD/AOGRD programmes; it is under preparation now. In case of any questions, feel free to send me a mail. autbas and newbas are programmes for "user friendly" [ :-) ] input for the argos programme. Autbas is older and knows only Huzinaga basis sets, newbas is newer, reads the basis sets from a library file, that can be extended by the user. In this archive, only Pople and Dunning basis sets are present. For documentation, look into the sources of the programmes.... Tom.Kovar@itc.univie.ac.at