-CSUM OCT 66 CHECKSUM
-LEN OCT 66 LENGTH TO GO
-BTYP OCT 66 BLOCK TYPE
-*
-*******************
-* VARIABLES OF THE MAIN PROGRAM
-ALOC *** ** NEXT WORD TO BE PUNCHED OUT
-ELOC *** ** LAST WORD TO BE PUNCHED OUT
-PTR DAC ** GENERAL PURPOSE MEMORY POINTER
+CSUM DAC ** CHECKSUM
+LEN DAC ** LENGTH COUNTER
+BTYP DAC ** BLOCK TYPE
+ALOC *** ** CURRENT LOCATION TO PUNCH
+ELOC *** ** LAST LOCATION TO PUNCH
+PTR DAC ** MEMORY POINTER