Performed spirometry, helium dilution lung volumes and single-breath DLCO. Could be upgraded to include closing volumes and N2 washout kung volumes. Used a wedge spirometer.  Came equipped with a top-of-the line IBM PC XT with dual 5-1/4″ floppy disk drives (!).  Photo is from a sales brochure courtesy of James Sullivan, BA, RPFT, Supervisor, Pulmonary Laboratories, Memorial Sloan Kettering Cancer Center.