<s>
In	O
computer	B-Architecture
networking	I-Architecture
,	O
Semaphore	B-Protocol
Flag	I-Protocol
Signaling	I-Protocol
System	I-Protocol
(	O
SFSS	O
)	O
is	O
a	O
humorous	O
proposal	O
to	O
carry	O
Internet	B-Protocol
Protocol	I-Protocol
(	O
IP	O
)	O
traffic	O
by	O
semaphores	B-Operating_System
.	O
</s>
<s>
Semaphore	B-Protocol
Flag	I-Protocol
Signaling	I-Protocol
System	I-Protocol
was	O
initially	O
described	O
in	O
RFC	B-Protocol
4824	I-Protocol
,	O
an	O
April	O
Fools	O
RFC	O
issued	O
by	O
the	O
Internet	O
Engineering	O
Task	O
Force	O
edited	O
by	O
J	O
.	O
Hofmueller	O
,	O
et	O
al	O
.	O
</s>
<s>
An	O
email	O
was	O
transmitted	O
using	O
SMTP	O
over	O
Semaphore	B-Operating_System
Flag	O
Signals	O
.	O
</s>
