<s>
xbiff	B-Application
is	O
a	O
small	O
utility	O
for	O
the	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
that	O
shows	O
a	O
mailbox	O
with	O
its	O
flag	O
raised	O
whenever	O
the	O
user	O
has	O
new	O
e-mail	O
.	O
</s>
<s>
It	O
is	O
included	O
in	O
almost	O
every	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
.	O
</s>
