There are several CICS mechanisms for passing control between programs.
| WHEN the mechanism is . . . | THEN control is passed from the requesting program to another program . . . |
|---|---|
| LINK | and a return to the requesting program is anticipated. |
| XCTL | but no return to the requesting program is anticipated. |
| RETURN | or to other requesting programs, if there are any, in returning order, and then to CICS. |