<s>
Two-pass	B-Device
verification	I-Device
,	O
also	O
called	O
double	B-Device
data	I-Device
entry	I-Device
,	O
is	O
a	O
data	O
entry	O
quality	O
control	O
method	O
that	O
was	O
originally	O
employed	O
when	O
data	O
records	O
were	O
entered	O
onto	O
sequential	O
80-column	O
Hollerith	B-Architecture
cards	I-Architecture
with	O
a	O
keypunch	B-Device
.	O
</s>
<s>
The	O
IBM	O
056	O
and	O
059	O
Card	O
Verifiers	O
were	O
companion	O
machines	O
to	O
the	O
IBM	B-Device
026	I-Device
and	O
029	O
keypunches	B-Device
,	O
respectively	O
.	O
</s>
<s>
The	O
later	O
IBM	O
129	O
keypunch	B-Device
also	O
could	O
operate	O
as	O
a	O
verifier	O
.	O
</s>
<s>
A	O
data	O
entry	O
operator	O
reentered	O
the	O
record	O
and	O
the	O
keypunch	B-Device
compared	O
the	O
new	O
keystrokes	O
with	O
those	O
loaded	O
into	O
the	O
buffer	O
.	O
</s>
<s>
This	O
method	O
has	O
survived	O
the	O
keypunch	B-Device
and	O
is	O
available	O
in	O
some	O
currently	O
available	O
data	O
entry	O
programs	O
(	O
e.g.	O
</s>
<s>
PSPP/SPSS	O
Data	O
Entry	O
)	O
.	O
</s>
