-(Note that on some systems, typing C-s will freeze the screen and you
-will see no further output from Emacs. This indicates that an
-operating system "feature" called "flow control" is intercepting the
-C-s and not letting it get through to Emacs. To unfreeze the screen,
-type C-q.)
-
-If you are in the middle of an incremental search and type <Delback>,
-you'll notice that the last character in the search string is erased
-and the search backs up to the last place of the search. For
-instance, suppose you have typed "c", to search for the first
-occurrence of "c". Now if you type "u", the cursor will move
-to the first occurrence of "cu". Now type <Delback>. This erases
-the "u" from the search string, and the cursor moves back to
-the first occurrence of "c".
+If you are in the middle of an incremental search and type <DEL>, the
+search "retreats" to an earlier location. If you type <DEL> just
+after you had typed C-s to advance to the next occurrence of a search
+string, the <DEL> moves the cursor back to an earlier occurrence. If
+there are no earlier occurrences, the <DEL> erases the last character
+in the search string. For instance, suppose you have typed "c", to
+search for the first occurrence of "c". Now if you type "u", the
+cursor will move to the first occurrence of "cu". Now type <DEL>.
+This erases the "u" from the search string, and the cursor moves back
+to the first occurrence of "c".