During the Concerted Action on Automated Cytogenetics the collaborating network has: (1) improved the performance and specifications of automatic metaphase finders, (2) developed new and more efficient techniques for segmenting metaphases into isolated chromosomes, (3) developed new and more efficient procedures for features extraction and chromosome classification, (4) developed alternative hardware and software for automated cytogenetic analysis, (5) developed prototype instrumentation for automated molecular cytogenetic analysis, (6) tested European systems for cytogenetic analysis that are commercially available, and (7) made these innovations available to European industry, which is currently leading the world market in systems for automated cytogenetics.