This Mel Bay QWIKGUIDE begins with basic music theory about scales and keys and teaches how to transpose several songs with and without the capo. Then we look at chords in keys and explore some typical chord progressions by swapping numbers ("one, four, five") for the chord names ("D, G, A"). Finally we study the "Nashville Numbering System" in depth by examining different notation styles and converting several well-known songs to number charts.