CLIST is a historical programming language created in 1990.

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Example code from Wikipedia:

1    /********************************************************************/
 2    /*  MULTI-LINGUAL "HELLO WORLD" PROGRAM.                            */
 3    /*                                                                  */
 4    /*  THIS CLIST, STORED AS USERID.TSO.CLIST(TEST), CAN BE INVOKED    */
 5    /*  FROM THE ISPF COMMAND LINE AS SHOWN IN THE FOLLOWING EXAMPLE:   */
 6    /*                                                                  */
 7    /*     COMMAND ===> TSO TEST SPANISH                                */
 8    /*                                                                  */
 9    /********************************************************************/
10    PROC 1 LANGUAGE
11      IF &LANGUAGE = SPANISH THEN +
12         WRITE HOLA, MUNDO
13      ELSE IF &LANGUAGE = FRENCH THEN +
14         WRITE BONJOUR, MONDE
15      ELSE +
16         WRITE HELLO, WORLD
17    EXIT
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Last updated February 11th, 2019