<s>
A	O
text-based	B-Protocol
web	I-Protocol
browser	I-Protocol
is	O
a	O
web	B-Application
browser	I-Application
that	O
renders	O
only	O
the	O
text	B-Application
of	O
web	O
pages	O
,	O
and	O
ignores	O
most	O
graphic	O
content	O
.	O
</s>
<s>
Under	O
small	O
bandwidth	O
connections	O
,	O
usually	O
,	O
they	O
render	O
pages	O
faster	O
than	O
graphical	O
web	B-Application
browsers	I-Application
due	O
to	O
lowered	O
bandwidth	O
demands	O
.	O
</s>
<s>
Additionally	O
,	O
the	O
greater	O
CSS	B-Language
,	O
JavaScript	B-Language
and	O
typography	B-Application
functionality	O
of	O
graphical	O
browsers	B-Application
require	O
more	O
CPU	B-Device
resources	O
.	O
</s>
<s>
Text-based	B-Protocol
browsers	I-Protocol
are	O
often	O
very	O
useful	O
for	O
users	O
with	O
visual	O
impairment	O
or	O
partial	O
blindness	O
.	O
</s>
<s>
They	O
are	O
especially	O
useful	O
with	O
speech	B-Application
synthesis	I-Application
or	O
text-to-speech	B-Application
software	I-Application
,	O
which	O
reads	O
content	O
to	O
users	O
.	O
</s>
<s>
Progressive	O
enhancement	O
allows	O
a	O
site	O
to	O
be	O
compatible	O
with	O
text-based	B-Protocol
web	I-Protocol
browsers	I-Protocol
without	O
compromising	O
functionality	O
to	O
more	O
sophisticated	O
browsers	B-Application
,	O
as	O
the	O
content	O
is	O
readable	O
through	O
pure	O
HTML	O
without	O
CSS	B-Language
or	O
JavaScript	B-Language
.	O
</s>
