A maxi single, maxi-single, or maxi CD is a music single release with more than the usual two tracks of an A-side song and a B-side song. Maxi singles are often mistaken for extended plays (EPs), especially in the digital era such as the categorization on iTunes, Apple Music, or Spotify. An EP usually consists of at least four different "songs" without any specific A-side, while a maxi-single may contain four or more tracks but only in form of remixes to complement one or two songs as the A-side. Billboard considers EPs for albums chart and considers maxi-singles for songs chart.