EXIT

        [SIC\]EXIT

    EXIT always ends SIC execution, at any level. On the opposite <^Z>  only
    ends  the  current  level  of  execution,  so that when typed at the top
    level, <^Z> also ends the session. Note that <^Z> may  be  trapped  when
    interactive editing is enabled.  Note that end of SIC execution does not
    necessarily means end of program execution: SIC  may  be  entered  again
    later by the calling  program.