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When each record (questionnaire) is stored on one card image and there is no card number then the reading of the data is straightforward. A SERIAL command may be used to define a field containing a unique record identifier. CL reads a new card and places it in data locations $1-80 every time START DATA is executed. When FINISH DATA is reached, if there are any more records to be read, execution control returns to START DATA to get the next record.

start control,

c=single.cba,

finish control,

start data,

! variables defined from $1-80,

...

finish data,