In 2005, the American Thoracic Society and the European Respiratory Society published a set of unified, combined standards for the measurement and interpretation of the most commonly used pulmonary function tests: spirometry, diffusing capacity, and lung volumes. The standards also include a chapter on operational issues for pulmonary laboratories and on the interpretation of lung function tests. This article briefly describes the process of developing the standards, provides a few highlights from the standards, and gives information on how you can access them.