<s>
The	O
text-only	O
monochrome	B-Device
IBM	B-Device
2260	I-Device
cathode-ray	B-Device
tube	I-Device
(	O
CRT	O
)	O
video	B-General_Concept
display	I-General_Concept
terminal	I-General_Concept
(	O
Display	O
Station	O
)	O
plus	O
keyboard	B-Device
was	O
a	O
1964	O
predecessor	O
to	O
the	O
more-powerful	O
IBM	B-Operating_System
3270	I-Operating_System
terminal	O
line	O
which	O
eventually	O
was	O
extended	O
to	O
support	O
color	O
text	O
and	O
graphics.There	O
were	O
three	O
models	O
of	O
2260	O
.	O
</s>
<s>
A	O
model	O
without	O
a	O
keyboard	B-Device
was	O
available	O
for	O
display-only	O
applications	O
.	O
</s>
<s>
The	O
eighty	O
character	O
width	O
corresponded	O
to	O
IBM	O
punch	B-Architecture
card	I-Architecture
format	O
.	O
</s>
<s>
The	O
IBM	B-Device
2260	I-Device
and	O
successor	O
devices	O
were	O
transitional	O
punch-card-to-CRT	O
computer	O
hardware	O
that	O
inspired	O
many	O
office	O
of	O
the	O
future	O
authors	O
to	O
write	O
about	O
the	O
potential	O
of	O
the	O
paperless	O
office	O
.	O
</s>
<s>
The	O
2260	O
was	O
a	O
raster	O
display	O
with	O
the	O
unusual	O
property	O
that	O
the	O
scan	B-Algorithm
lines	I-Algorithm
were	O
vertical	O
they	O
went	O
from	O
top	O
to	O
bottom	O
rather	O
than	O
the	O
more	O
common	O
left	O
to	O
right	O
.	O
</s>
<s>
The	O
controller	O
could	O
function	O
as	O
a	O
local	O
channel-attached	B-Device
device	O
or	O
as	O
a	O
remote	O
device	O
at	O
up	O
to	O
2400bit/s	O
.	O
</s>
<s>
An	O
optional	O
adapter	O
allowed	O
the	O
attachment	O
of	O
one	O
IBM	B-Device
1053	I-Device
printer	I-Device
which	O
was	O
shared	O
by	O
all	O
displays	O
attached	O
to	O
the	O
2848	O
.	O
</s>
<s>
The	O
2848	O
stored	O
the	O
digital	B-General_Concept
image	O
of	O
screens	O
of	O
information	O
in	O
an	O
acoustic	O
delay	O
line	O
.	O
</s>
<s>
Before	O
the	O
introduction	O
of	O
integrated	O
circuit	O
chips	O
,	O
the	O
technology	O
was	O
based	O
on	O
discrete-component	O
individual	O
transistors	B-Application
.	O
</s>
<s>
Mainframe	B-Architecture
computers	I-Architecture
used	O
magnetic	O
core	O
memory	O
,	O
which	O
was	O
too	O
expensive	O
for	O
use	O
in	O
video	B-General_Concept
display	I-General_Concept
terminals	I-General_Concept
.	O
</s>
<s>
The	O
central	O
controller	O
system	O
vibrated	O
the	O
electromagnet	O
like	O
an	O
audio-speaker	O
voice	B-Device
coil	I-Device
.	O
</s>
<s>
The	O
vibration	O
was	O
converted	O
to	O
raster	O
scan	B-Algorithm
lines	I-Algorithm
and	O
sent	O
to	O
the	O
nearby	O
CRT	B-Device
display	I-Device
.	O
</s>
<s>
One	O
effect	O
of	O
the	O
2848	O
delay	O
line	O
was	O
that	O
if	O
a	O
heavy	O
person	O
walked	O
next	O
to	O
the	O
controller	O
,	O
or	O
if	O
it	O
was	O
mounted	O
next	O
to	O
a	O
vibration	O
source	O
(	O
like	O
an	O
elevator	O
)	O
,	O
digital	B-General_Concept
bits	O
of	O
screen	O
images	O
would	O
be	O
lost	O
on	O
all	O
of	O
the	O
video	O
displays	O
,	O
which	O
would	O
then	O
be	O
repeated	O
continuously	O
through	O
the	O
feedback	O
loop	O
until	O
a	O
new	O
video	O
display	O
was	O
transmitted	O
to	O
all	O
of	O
the	O
connected	O
terminals	O
.	O
</s>
<s>
The	O
IBM	B-Device
2260	I-Device
and	O
2265	O
as	O
well	O
as	O
the	O
IBM	O
2848	O
were	O
unusual	O
in	O
their	O
usage	O
of	O
the	O
approved	O
,	O
but	O
never	O
published	O
1965	O
revision	O
of	O
the	O
ASCII	B-Protocol
standard	O
ASA	O
X3.4-1965	O
.	O
</s>
