<s>
This	O
is	O
an	O
alphabetic	O
list	B-Protocol
of	I-Protocol
defunct	I-Protocol
instant	I-Protocol
messaging	I-Protocol
platforms	I-Protocol
,	O
showing	O
the	O
name	O
,	O
when	O
it	O
was	O
discontinued	O
and	O
the	O
type	O
of	O
client	O
.	O
</s>
<s>
Yahoo	B-Application
!	O
</s>
