<s>
The	O
Callboard	B-Protocol
Network	I-Protocol
was	O
an	O
electronic	O
communication	O
network	O
operated	O
by	O
the	O
University	O
of	O
Alberta	O
for	O
USITT	O
in	O
the	O
late	O
1980s	O
and	O
early	O
1990s	O
.	O
</s>
