If I were to be banished to some remote exile where I could listen to the music of only one group, that group would be Steely Dan. I first became aware of them when I bought the album Aja in 1977. In the years since then I have returned to their music again and again---it never ceases to surprise and inspire. Since their inception, Steely Dan has followed a unique path in popular music writing complex song forms incorporating extensive jazz influences. This timeline will chart the careers of the two principal members of Steely Dan as well as the evolution of their band and its sound.