<s>
The	O
IBM	B-Device
1402	I-Device
was	O
a	O
high	O
speed	O
card	B-Device
reader/punch	I-Device
introduced	O
on	O
October	O
5	O
,	O
1959	O
as	O
a	O
peripheral	O
input/output	O
device	O
for	O
the	O
IBM	B-Device
1401	I-Device
computer	O
.	O
</s>
<s>
It	O
was	O
later	O
used	O
with	O
other	O
computers	O
of	O
the	O
IBM	B-Device
1400	I-Device
series	I-Device
and	O
IBM	B-Device
7000	I-Device
series	I-Device
product	O
lines	O
.	O
</s>
<s>
It	O
was	O
adapted	O
as	O
the	O
IBM	B-Device
1622	I-Device
Card	O
Read-Punch	O
for	O
the	O
IBM	B-Device
1620	I-Device
and	O
provided	O
the	O
basic	O
design	O
for	O
the	O
models	O
2501	B-Device
,	O
2520	O
and	O
2540	B-Device
equipment	O
used	O
with	O
the	O
IBM	B-Application
System/360	I-Application
product	O
line	O
.	O
</s>
<s>
Card	O
read	O
speed	O
up	O
to	O
800	O
punched	B-Architecture
cards	I-Architecture
per	O
minute	O
(	O
models	O
1	O
,	O
2	O
and	O
3	O
)	O
or	O
450	O
cards	O
per	O
minute	O
(	O
models	O
4	O
,	O
5	O
and	O
6	O
)	O
.	O
</s>
<s>
Card	B-Device
punch	I-Device
speed	O
up	O
to	O
250	O
cards	O
per	O
minute	O
(	O
all	O
models	O
)	O
.	O
</s>
<s>
The	O
2/8	O
stacker	O
is	O
shared	O
by	O
the	O
card	B-Device
reader	I-Device
and	O
punch	B-Device
,	O
but	O
timing	O
considerations	O
make	O
it	O
difficult	O
to	O
use	O
for	O
merging	O
operations	O
.	O
</s>
<s>
Option	O
to	O
read	O
from	O
the	O
punch	B-Device
feed	O
.	O
</s>
<s>
The	O
1402	O
uses	O
IBM	O
80-column	O
punched	B-Architecture
card	I-Architecture
format	O
,	O
although	O
an	O
option	O
was	O
available	O
to	O
process	O
51-column	O
cards	O
.	O
</s>
<s>
Both	O
the	O
reader	O
and	O
punch	B-Device
mechanisms	O
count	O
the	O
number	O
of	O
holes	O
in	O
each	O
column	O
at	O
a	O
separate	O
station	O
.	O
</s>
<s>
In	O
addition	O
,	O
when	O
not	O
operating	O
in	O
column-binary	O
mode	O
,	O
the	O
reader	O
indicates	O
an	O
error	O
and	O
stops	O
(	O
if	O
the	O
I/O	O
check	O
stop	O
switch	O
is	O
on	O
)	O
if	O
the	O
punch	B-Device
combination	O
in	O
any	O
column	O
does	O
not	O
indicate	O
a	O
valid	O
character	O
.	O
</s>
