<s>
CompuServe	B-Protocol
CB	I-Protocol
Simulator	O
was	O
the	O
first	O
dedicated	O
online	B-Protocol
chat	I-Protocol
service	O
that	O
was	O
widely	O
available	O
to	O
the	O
public	O
.	O
</s>
<s>
It	O
was	O
developed	O
by	O
a	O
CompuServe	O
executive	O
,	O
Alexander	O
"	O
Sandy	O
"	O
Trevor	O
,	O
and	O
released	O
by	O
CompuServe	O
on	O
February	O
21	O
,	O
1980	O
,	O
as	O
the	O
first	O
public	O
,	O
commercial	O
multi-user	O
chat	B-Protocol
program	I-Protocol
.	O
</s>
<s>
At	O
that	O
time	O
,	O
most	O
people	O
were	O
familiar	O
with	O
citizens	B-Application
band	I-Application
radio	I-Application
,	O
often	O
abbreviated	O
as	O
CB	B-Application
radio	I-Application
,	O
but	O
multi-user	O
chat	B-Protocol
and	O
instant	B-Application
messaging	I-Application
were	O
largely	O
unknown	O
.	O
</s>
<s>
CompuServe	B-Protocol
CB	I-Protocol
used	O
the	O
CB	B-Application
radio	I-Application
paradigm	O
to	O
help	O
users	O
understand	O
the	O
new	O
concept	O
.	O
</s>
<s>
Like	O
CB	B-Application
radio	I-Application
it	O
had	O
40	O
"	O
channels	O
"	O
and	O
commands	O
like	O
"	O
tune	O
"	O
,	O
"	O
squelch	O
"	O
,	O
and	O
"	O
monitor	O
"	O
.	O
</s>
<s>
CompuServe	B-Protocol
CB	I-Protocol
quickly	O
became	O
the	O
largest	O
single	O
product	O
on	O
CompuServe	O
despite	O
virtually	O
no	O
marketing	O
.	O
</s>
<s>
The	O
first	O
online	O
wedding	O
occurred	O
on	O
CompuServe	B-Protocol
CB	I-Protocol
,	O
and	O
worldwide	O
fans	O
organized	O
events	O
to	O
meet	O
in	O
the	O
"	O
real	O
world	O
"	O
people	O
they	O
had	O
met	O
in	O
CB	O
.	O
</s>
<s>
Later	O
,	O
enhancements	O
to	O
CompuServe	B-Protocol
CB	I-Protocol
were	O
made	O
to	O
enable	O
multiplayer	O
games	O
,	O
digital	O
pictures	O
,	O
multimedia	O
,	O
and	O
large	O
conferences	O
.	O
</s>
<s>
For	O
example	O
,	O
Mick	O
Jagger	O
of	O
the	O
Rolling	O
Stones	O
held	O
the	O
first	O
online	O
multimedia	O
conference	O
using	O
CompuServe	B-Protocol
CB	I-Protocol
from	O
London	O
on	O
December	O
7	O
,	O
1995	O
.	O
</s>
<s>
The	O
CompuServe	B-Protocol
CB	I-Protocol
Simulator	O
was	O
also	O
the	O
setting	O
for	O
The	O
Strange	O
Case	O
of	O
the	O
Electronic	O
Lover	O
,	O
an	O
ethnographic	O
study	O
by	O
Lindsy	O
Van	O
Gelder	O
examining	O
the	O
phenomenon	O
of	O
gender-bending	O
identity	O
in	O
the	O
early	O
days	O
of	O
online	O
chatrooms	O
,	O
and	O
how	O
one	O
user	O
's	O
exposure	O
as	O
a	O
man	O
pretending	O
to	O
be	O
female	O
influenced	O
a	O
user	O
community	O
.	O
</s>
<s>
The	O
CB	B-Protocol
Simulator	I-Protocol
continued	O
in	O
service	O
until	O
the	O
shuttering	O
of	O
the	O
CompuServe	O
Classic	O
service	O
in	O
2009	O
.	O
</s>
<s>
In	O
October	O
1983	O
CBSIM	O
CB	B-Protocol
Simulator	I-Protocol
was	O
written	O
and	O
released	O
by	O
Jerry	B-Protocol
Thomas	I-Protocol
Hunter	I-Protocol
as	O
the	O
first	O
publicly	O
accessible	O
CB	B-Protocol
Simulator	I-Protocol
software	O
available	O
for	O
privately	O
operated	O
computer	B-Application
bulletin	I-Application
board	I-Application
systems	I-Application
(	O
BBSs	O
)	O
.	O
</s>
<s>
The	O
program	O
was	O
released	O
as	O
"	O
freeware	O
"	O
as	O
an	O
add-on	O
module	O
(	O
or	O
"	O
Door	O
"	O
)	O
for	O
the	O
popular	O
RBBS-PC	B-Protocol
.	O
</s>
<s>
It	O
enabled	O
users	O
connected	O
on	O
one	O
node	O
of	O
a	O
bulletin	B-Application
board	I-Application
system	I-Application
to	O
"	O
chat	B-Protocol
"	O
with	O
users	O
dialed	O
in	O
on	O
other	O
nodes	O
.	O
</s>
<s>
The	O
source	O
code	O
was	O
released	O
to	O
the	O
public	O
from	O
the	O
inception	O
of	O
the	O
CBSIM	O
project	O
,	O
and	O
this	O
source	O
code	O
quickly	O
became	O
the	O
foundation	O
for	O
multi-node	O
chat	B-Protocol
systems	O
embedded	O
in	O
other	O
popular	O
BBS	O
software	O
products	O
.	O
</s>
<s>
It	O
was	O
accomplished	O
by	O
using	O
a	O
rare	O
shared	O
R/W	O
Runtime	O
system	O
,	O
to	O
keep	O
track	O
of	O
users	O
in	O
the	O
CB	B-Protocol
simulator	I-Protocol
.	O
</s>
<s>
Built	O
in	O
was	O
also	O
a	O
pseudo-tty	O
module	O
,	O
which	O
allowed	O
you	O
to	O
execute	O
programs	O
,	O
while	O
'	O
chatting	B-Protocol
 '	O
in	O
CB	O
on	O
the	O
same	O
terminal	O
.	O
</s>
