VMS Help TCPIP Services, TELNET, TN3270 Keyboard Functions, DELETE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    VT100: Delete               VT200: <X]
    DEFINE_KEY Function: DELETE

    Deletes the character at the cursor. The cursor remains where it
    is, and the other characters to the right of the cursor in the
    same field move one position to the left. The end of the field
    fills with blanks. Note that this is not the action normally
    associated with the Delete key on DIGITAL terminals.