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Two computer programs were designed for helping in library handling and microbial identification by means of their infrared spectra. The program 'Transform' runs in the IR Data Manager environment and produces ASCII files containing transformed data from infrared absorbance spectra. The program 'WinSpectra' is written in Visual Basic v. 3.0. It imports the ASCII files created with 'Transform', and is able to handle, analyse and identify them by their mathematical comparison with a library of microbial spectra. Both programs run in graphical, menu-driven interface (GEM and MS Windows, for IBM-PC compatibles, with extensive on-line help.

A computer program has been designed to carry out microbial identification using probability matrices along with the Bayes theorem. When implementing the system the main considerations have been flexibility, user-friendliness and integration of identification coefficients and mathematical tests of matrices. The program has been developed in QuickBASIC for PC/MS-DOS operating systems and presents a menu-driven structure that aims to facilitate its use.