This "Instant Chord Finder" is a wonderful way to find any chord in any key in a hurry. It comes on a CD Rom -- slip it into your computer and it opens up on your desktop to show all major, minor, augmented, diminished, 6th, 7th, 9th, 11th, 13th, and sus chords. Also shows the scale of each chord and the chord as it appears on the treble or bass clef as well as how it looks on a piano keyboard. Works on all computers except Macs.