<s>
The	O
Silent	B-Application
700	I-Application
,	O
introduced	O
in	O
1971	O
,	O
was	O
a	O
line	O
of	O
portable	O
computer	B-General_Concept
terminals	I-General_Concept
manufactured	O
by	O
Texas	O
Instruments	O
in	O
the	O
1970s	O
and	O
1980s	O
.	O
</s>
<s>
Silent	B-Application
700s	I-Application
printed	O
with	O
a	O
5	O
x	O
7	O
dot-matrix	B-General_Concept
heating	O
element	O
onto	O
a	O
roll	O
of	O
heat-sensitive	O
paper	O
.	O
</s>
<s>
Some	O
models	O
were	O
equipped	O
with	O
an	O
integrated	O
acoustic	B-Device
coupler	I-Device
and	O
modem	O
that	O
could	O
receive	O
data	O
at	O
30	O
characters	O
per	O
second	O
.	O
</s>
<s>
Other	O
models	O
could	O
be	O
directly	O
connected	O
to	O
computers	O
at	O
300	O
bits	O
per	O
second	O
(	O
bit/s	O
)	O
,	O
and	O
were	O
sometimes	O
used	O
as	O
the	O
System	B-Device
console	I-Device
where	O
a	O
hard	O
copy	O
record	O
of	O
the	O
activities	O
would	O
be	O
retained	O
for	O
a	O
period	O
of	O
time	O
.	O
</s>
<s>
As	O
1200	O
bps	O
(	O
i.e.	O
,	O
1200	O
bit/s	O
)	O
dialup	O
communication	O
became	O
more	O
common	O
among	O
Time-sharing	B-General_Concept
providers	O
,	O
the	O
Silent	B-Application
700	I-Application
faced	O
the	O
problem	O
that	O
its	O
printhead	O
technology	O
simply	O
could	O
n't	O
"	O
heat	O
up	O
all	O
the	O
little	O
dots	O
"	O
at	O
120	O
characters	O
per	O
second	O
.	O
</s>
<s>
This	O
allowed	O
the	O
product	O
line	O
to	O
survive	O
a	O
few	O
more	O
years	O
in	O
the	O
new	O
high-speed	O
interactive	B-General_Concept
computing	I-General_Concept
environment	O
of	O
the	O
mid-1980s	O
.	O
</s>
