<s>
Tween	B-Protocol
is	O
a	O
Twitter	B-Application
client	O
for	O
Microsoft	O
Windows	O
,	O
written	O
in	O
Visual	B-Language
Basic	I-Language
.NET	I-Language
.	O
</s>
<s>
It	O
is	O
one	O
of	O
the	O
most	O
popular	O
Twitter	B-Application
clients	O
in	O
Japan	O
,	O
and	O
it	O
was	O
open-source	B-Application
.	O
</s>
<s>
Originally	O
,	O
Tween	B-Protocol
was	O
developed	O
for	O
heavy	O
users	O
.	O
</s>
<s>
For	O
this	O
reason	O
,	O
Tween	B-Protocol
is	O
a	O
Twitter	B-Application
client	O
with	O
various	O
functions	O
.	O
</s>
