<s>
The	O
IBM	B-Device
533	I-Device
Input-Output	O
Unit	O
,	O
announced	O
on	O
July	O
2	O
,	O
1953	O
,	O
was	O
a	O
punched	B-Device
card	I-Device
reader	I-Device
and	O
punch	B-Device
that	O
served	O
as	O
the	O
primary	O
input-output	O
unit	O
for	O
the	O
IBM	B-Device
650	I-Device
computer	O
.	O
</s>
<s>
IBM	B-Architecture
cards	I-Architecture
were	O
fed	O
face	O
down	O
,	O
12-edge	O
first	O
.	O
</s>
<s>
All	O
80	B-Architecture
columns	I-Architecture
could	O
be	O
read	O
and	O
punched	O
by	O
the	O
computer	O
as	O
numeric	O
data	O
,	O
but	O
alphanumeric	O
reading	O
was	O
severely	O
limited	O
on	O
the	O
basic	O
650	O
and	O
require	O
special	O
control	O
panel	O
wiring	O
.	O
</s>
<s>
The	O
533	O
could	O
punch	B-Device
100	O
cards	O
per	O
minute	O
and	O
had	O
a	O
set	O
of	O
read	O
brushes	O
downstream	O
from	O
the	O
punch	B-Device
station	O
that	O
were	O
used	O
to	O
verify	O
proper	O
punching	O
.	O
</s>
<s>
The	O
card	B-Device
reader	I-Device
was	O
similar	O
to	O
that	O
on	O
the	O
IBM	O
402	O
accounting	O
machine	O
and	O
could	O
read	O
200	O
cards	O
per	O
minute	O
.	O
</s>
<s>
On	O
January	O
12	O
,	O
1959	O
,	O
IBM	O
introduced	O
two	O
faster	O
650	O
peripherals	O
,	O
the	O
IBM	O
543	O
Card	B-Device
Reader	I-Device
and	O
the	O
IBM	O
544	O
Card	B-Device
Punch	I-Device
.	O
</s>
