The "S" command is used to locate a specified string of
  text in the current buffer.  If the text is found, the
  pointer is positioned after the specified text.  If the
  text is not found, an error message is printed and the
  pointer is set to the beginning of the buffer.

  The "S" command is of the form:

      Stext-to-locate<ESC>

  For example, to find the text "find me", use the command

      Sfind me$

  (Note that the <ESC> key echoes as "$" at your terminal.)