Symbol	Description	Symbol	Description	Symbol	Description
C	C major	Cm	C minor	Cdim	C diminished (flattened fifth)
C7	C (domiant) seventh	Cm7	C minor seventh	Caug	C augmented (raised fifth)
CM7	C major seventh	CmM7	C minor with a major seventh	Cdim7	Diminshed seventh with a C root
C6	C sixth	Cm6	C minor sixth	Cm7b5	C minor seventh with a flattened fifth Also known as C half-dimished
C9	C (dominant) seventh plus a ninth	C7b9	C (dominant) seventh plus a flattened ninth	C7#9	C (dominant) seventh plus a raised ninth
Csus9	C major with an added 9th	Csus9-8	As Csus9 but 9th resolves to 8ve	Csus2	As Csus9 but with the ninth voiced 'closed' within the octave
Csus4	C with a suspended 4th	Csus4-3	As Csus4 but resolves to standard major chord	C/x	C over bass note 'x'
C(b5)	C with a flattened 5th (bracketted to avoid confusion i.e. Ab(b5))	C(#4)	As C(b5) but in a different harmonic context	C13	C (dominant) seventh with an added 13th (no 9th or 11th)
Chords featuring extensions above the dominant seventh, namely the 9th, 11th and 13th can often be voiced in several ways, due to the number of notes (degrees of the scale) these chords can feature. Each can appear in several guises, and are often more efficiently expressed, as chord symbols, in alternate ways (especially for non-jazz players). See this document for clarification (or confusion). A bracketted number next to a chord (other than a (b5) or (#5) indicates a momentary, superficial or decorative suspension or extension that is relatively unimportant to the underlying progression. A bracketted chord at the beginning of a line indicates that this chord is carried over from the previous line.