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- Two_pass_verification abstract "Two-pass verification, also called double data entry, is a data entry quality control method that was originally employed when data records were entered onto sequential 80-column Hollerith cards with a keypunch. In the first pass through a set of records, the data keystrokes were entered onto each card as the data entry operator typed them. On the second pass through the batch, an operator at a separate machine, called a verifier, entered the same data. The verifier compared the second operator's keystrokes with the contents of the original card. If there were no differences, a verification notch was punched on the right edge of the card.The later IBM 129 keypunch also could operate as a verifier. In that mode, it read a completed card (record) and loaded the 80 keystrokes into a buffer. A data entry operator reentered the record and the keypunch compared the new keystrokes with those loaded into the buffer. If a discrepancy occurred the operator was given a chance to reenter that keystroke and ultimately overwrite the entry in the buffer. If all keystrokes matched the original card, it was passed through and received a verification punch. If corrections were required, then the operator was prompted to discard the original card and insert a fresh card on which corrected keystrokes were typed. The corrected record (card) was passed through and received a corrected verification punch.".
- Two_pass_verification wikiPageID "9655251".
- Two_pass_verification wikiPageRevisionID "564378238".
- Two_pass_verification hasPhotoCollection Two_pass_verification.
- Two_pass_verification subject Category:Data_quality.
- Two_pass_verification subject Category:Punched_card.
- Two_pass_verification comment "Two-pass verification, also called double data entry, is a data entry quality control method that was originally employed when data records were entered onto sequential 80-column Hollerith cards with a keypunch. In the first pass through a set of records, the data keystrokes were entered onto each card as the data entry operator typed them. On the second pass through the batch, an operator at a separate machine, called a verifier, entered the same data.".
- Two_pass_verification label "Two pass verification".
- Two_pass_verification sameAs m.02pn9hx.
- Two_pass_verification sameAs Q7859437.
- Two_pass_verification sameAs Q7859437.
- Two_pass_verification wasDerivedFrom Two_pass_verification?oldid=564378238.
- Two_pass_verification isPrimaryTopicOf Two_pass_verification.