A highly automated laboratory data processing environment for use with Coulter STKS haematology analysers is described. This in-house system is based on a network of personal computers running Novell Network software and communicating with an IBM mainframe. The system captures the leucocyte scatterplot graphic and numeric parameters from the blood analysers, integrating this with patient demographic and request data held on the host computer. This composite picture is then reviewed on the network by laboratory personnel before generating printed reports. The system has provided greater data integrity, reduced paper flow and improved efficiency in the laboratory's operations and lays the foundations for dealing effectively with the next generation of advanced haematology analysers.