<s>
Abaco	B-Protocol
is	O
a	O
discontinued	O
web	B-Application
browser	I-Application
for	O
the	O
Plan	B-Operating_System
9	I-Operating_System
operating	I-Operating_System
system	I-Operating_System
.	O
</s>
<s>
It	O
is	O
a	O
graphical	O
web	B-Application
browser	I-Application
with	O
support	O
for	O
inline	O
images	O
,	O
tables	O
and	O
frames	O
.	O
</s>
<s>
It	O
has	O
a	O
true	O
multiple	O
document	O
interface	O
inspired	O
by	O
acme	B-Application
's	O
interface	O
.	O
</s>
<s>
,	O
a	O
web	O
file	O
system	O
,	O
and	O
libhtml	O
,	O
a	O
library	O
to	O
parse	O
HTML	B-Language
,	O
were	O
written	O
at	O
Bell	O
Labs	O
as	O
the	O
backend	O
for	O
a	O
new	O
web	B-Application
browser	I-Application
.	O
</s>
<s>
After	O
the	O
Bell	O
Labs	O
project	O
stalled	O
,	O
Aki	O
Nyrhinen	O
wrote	O
a	O
simple	O
frontend	O
for	O
webfs	O
and	O
libhtml	O
called	O
webpage	O
which	O
can	O
render	O
basic	O
web	O
pages	O
and	O
makes	O
interesting	O
use	O
of	O
the	O
plumber	B-Application
to	O
support	O
hyperlinks	O
.	O
</s>
<s>
Work	O
on	O
webpage	O
also	O
stalled	O
,	O
and	O
webpage	O
has	O
now	O
been	O
superseded	O
by	O
abaco	B-Protocol
.	O
</s>
<s>
Abaco	B-Protocol
,	O
written	O
by	O
Federico	O
G	O
.	O
Benavento	O
,	O
supports	O
most	O
of	O
the	O
HTML	B-Language
4.01	I-Language
standard	O
,	O
including	O
frames	O
and	O
tables	O
.	O
</s>
