As others have pointed out, FSM's are very useful to formalize/organize behaviour in a stateful workflow. One domain where I think they shine is in implementin

As others have pointed out, FSM's are very useful to formalize/organize behaviour in a stateful workflow. One domain where I think they shine is in implementing structured binary format decoders (such as multimedia streams). Here is a brief introduction which may be of help: https://www.cs.princeton.edu/courses/archive/spr06/cos116/FSM_Tutorial.pdf https://www.cs.princeton.edu/courses/archive/spr06/cos116/FS...