In this book you are introduced to major, minor and seventh chords. The following chord charts contain many other chords you may find in sheet music. Other important chord types are the minor seventh chord (m7), augmented (+) and diminished (o) chords. These are listed on the following pages. There are many other types of chords e.g., sixth (6), suspended (sus), ninth (9) etc. The following charts show three different positions for each chord: