Why they're worth studying: Suffix automata, like suffix trees, have a number of applications in text
processing and computational biology. In many ways, they're simpler than suffix trees (the representation
doesn't require any crazy pointer compress tricks, for example). If you liked suffix trees and want to see
what they led into, this would be a great place to start.
The Burrows-Wheeler Transform
The Burrows-Wheeler transform is a transformation on a string that, in many cases, makes the string
more compressible. It's closely related to suffix arrays, and many years after its invention was repurposed
for use in string processing and searching applications. It now forms the basis for algorithms both in text
compression and sequence analysis.
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