On Thu, 18 Jun 1992 17:50:06 PST Bill Cohen said:
>We are setting up LISTSERV and have noticed that sometimes
>when issuing commands which need userid@node it comes out userinode
>It does not always happen and not on every account.
 
It's CP that's doing this.  At most sites "@" is the default terminal
character-delete character in the sense that when a user types "@"
the result is the character immediately preceding the "@" is deleted.
A user can verify this by typing CP QUERY TERMINAL which will reveal
a response (among other things) of  CHARDEL @  or  CHARDEL OFF  or
CHARDEL <some_other_character>.  To cause the "@" character to become
an ordinary character when typed, just give the command
CP TERMINAL CHARDEL OFF .  Better yet, put it into your PROFILE EXEC.
 
It's hard to understand why CHARDEL @ continues to be the default with
everybody these days using modern terminals.
                                             /b