Tasks started tag

[Chris Henderson]

I have the following line in my .emacs for tasks which I invoke with C-c
C-t. How can I add another tag called 'Started' for tasks I already started:

(setq org-todo-keywords
            '((sequence "TODO(t)" "|" "DONE(d)")
              (sequence "|" "CANCELED(c)")))

(setq org-todo-keyword-faces
           '(("CANCELED" . (:foreground "blue" :weight bold))))

Thanks.