!JOB ARSRCHAA,RPT/*.IVL;OUTCLASS=LP,1

Today's mystery is a dusty deck submitted by sachin to Stack Overflow. He's charged with converting this old report code to SQL, but there's one problem: he can't even identify the language that the old program is coded in! Gilbert Le Blanc surmises that the JCL identifies the host computer as a Systems Engineering Laboratories/Gould/Encore machine, but there the trail ends.