======== AT&T ksh ========

---- VI mode ----

ESC+\       autocomplete
ESC+*       list the files that match the current autocomplete prefix
ESC+/str    search the commandline history for the string
ESC+n       search for the next occurance of string
ESC+k       go back one in the commandline history
ESC+j       go forward one in the commandline history

---- EMACS mode ----
ESC+ESC     autocomplete
up-arrow    go back one in the commandline history


======== pdksh ========

---- VI mode ----
ESC+\       autocomplete
ESC+TAB     autocomplete        [when 'vi-tabcomplete' mode is set]
ESC+ESC     autocomplete        [when 'vi-esccomplete' mode is set]