1868	 On Obtaining Correct Input A New Approach	 Most information put into machine readable form whether from scientific or business origins is still keypunched. This paper is addressed toward the difficulty of obtaining correctly keypunched and key verified data and an alternative method is suggested in which the computer itself is used to rule out the possibility of errors in input. This technique is explained and illustrated by reference to a working program which involves essentially two phases in the first phase errors are detected by the machine and subsequently in the second phase they are corrected by it. correct data correct input data correction keypunch key verifier verifier
