he study of chronic obstructive lung disease shows that the discomfort experienced by sufferers of this disease is largely due to their inability to empty the lungs during expiration. After inducing pulmonary hyperinflation in healthy subjects, researchers studied the results in an attempt to develop new breathing techniques and upper-body strengthening exercises suitable for patients. Extensive instrumentation was required to monitor test subject's breathing patterns. A data acquisition and analysis package that allowed researchers to view, plot and analyze data while the experiment was being run was essential in quantifying the results of the experiments. The complete acquisition, analysis and plotting solution was built in a single software environment.