Music Button accordions

Button accordions are widely used in Irish traditional music and are also popular in many countries where they are also used mainly for playing popular music and traditional folk music, and modern offshoots of these genres.   In Ireland, melodeon (Irish: mileoidean or an bosca) is reserved for instruments with a single row of melody buttons (a  one-row   instrument), while instruments with two or three rows are called button accordions (often simply accordions).