Screen capture of a typical page to access EMAA data. The example shown here is for DCN. In the first section, the user chooses the type of transition (among hyperfine structure, fine-structure, rotational, ro-vibrational) when several are available. In the second section, the collision partners are selected. The data can either be downloaded or displayed on screen by using one of the buttons at the bottom of the page. A comment box with notable information about the system might be present, depending on the species. An archive section is available, and it allows the user to access older spectroscopic or collisional data, when they exist.