How to add "suspend" (control-Z)?

[wa371]

Is it possible to add the "suspend" or control-Z function
to a version-7 system?  It supports both sh and csh.
Thanks

Bernd Riechelmann                   (Not affiliated with U.C. San Diego)
UUCP: ...!ucbvax!sdcsvax!sdcc12!wa371,   ARPA: sdcsvax!sdcc12!wa371 at nosc