This was sparked by the following presentation given by Mark Rendle:
First up is IBM Cobol's Hello World code:
//COBUCLG JOB CLASS-A, MSGCLASSZA,
//HELOWRLD EXEC COBUCLG,PARM.COB='MAP,LIST,LET'
//COB.SYSIN DD *
001 IDENTIFICATION DIVISION.
002 PROGRAM-ID. 'HELLO'.
003 ENVIRONMENT DIVISION.
004...