<s>
CitySpace	B-General_Concept
was	O
an	O
internet-based	O
virtual	B-Application
world	I-Application
launched	O
at	O
SIGGRAPH	O
1993	O
by	O
educator	O
and	O
project	O
director	O
Zane	O
Vella	O
.	O
</s>
<s>
CitySpace	B-General_Concept
was	O
one	O
of	O
the	O
earliest	O
online	O
virtual	O
3D	O
environments	O
and	O
first	O
came	O
to	O
attention	O
via	O
mainstream	O
news	O
media	O
in	O
late	O
1993	O
.	O
</s>
<s>
CitySpace	B-General_Concept
was	O
also	O
the	O
first	O
user-generated	O
virtual	B-Application
world	I-Application
,	O
similar	O
to	O
virtual	B-Application
worlds	I-Application
like	O
Second	B-Application
Life	I-Application
,	O
and	O
enabled	O
participants	O
to	O
contribute	O
3D	O
computer	O
graphics	O
and	O
digital	O
imagery	O
to	O
a	O
collaborative	O
real-time	O
rendered	O
3D	O
virtual	B-Application
world	I-Application
in	O
which	O
participants	O
interacted	O
with	O
each	O
other	O
via	O
avatars	B-Application
.	O
</s>
<s>
CitySpace	B-General_Concept
was	O
active	O
from	O
1993-1996	O
and	O
won	O
the	O
1996	O
NII	O
Award	O
for	O
Arts	O
and	O
Entertainment	O
.	O
</s>
<s>
Early	O
CitySpace	B-General_Concept
installations	O
at	O
the	O
Boston	O
Computer	O
Museum	O
(	O
1993	O
)	O
,	O
Exploratorium	O
(	O
1994	O
and	O
1995	O
)	O
and	O
Ontario	O
Science	O
Center	O
(	O
1995	O
)	O
combined	O
educational	O
computer	O
graphics	O
workshops	O
and	O
introduction	O
to	O
internet	O
communications	O
for	O
young	O
people	O
ages	O
8	O
to	O
18	O
.	O
</s>
<s>
Both	O
during	O
and	O
between	O
CitySpace	B-General_Concept
installations	O
,	O
contributors	O
around	O
the	O
world	O
collaborated	O
via	O
email	O
and	O
early	O
internet	O
video	O
tools	O
including	O
CU-SeeMe	B-Protocol
to	O
create	O
avatars	B-Application
,	O
buildings	O
,	O
vehicles	O
and	O
virtual	O
toys	O
.	O
</s>
<s>
CitySpace	B-General_Concept
installations	O
consisted	O
of	O
networked	O
Silicon	O
Graphics	O
Onyx	B-General_Concept
Reality	I-General_Concept
Engine	I-General_Concept
supercomputers	B-Architecture
,	O
Macintosh-based	O
3D	O
modeling	O
and	O
graphics	O
software	O
,	O
videoconferencing	B-Application
and	O
data	O
projection	O
.	O
</s>
<s>
The	O
CitySpace	B-General_Concept
software	O
,	O
written	O
by	O
Chris	O
Cederwall	O
of	O
the	O
Electronic	O
Visualization	O
Laboratory	O
,	O
enabled	O
real-time	B-General_Concept
rendering	I-General_Concept
,	O
six	O
degrees	O
of	O
avatar	B-Application
motion	O
,	O
text	O
chat	O
,	O
and	O
peer-to-peer	O
communication	O
between	O
CitySpace	B-General_Concept
clients	O
for	O
sharing	O
avatar	B-Application
position	O
information	O
,	O
chat	O
content	O
,	O
and	O
graphics	O
updates	O
.	O
</s>
<s>
In	O
1994	O
CitySpace	B-General_Concept
was	O
also	O
featured	O
in	O
the	O
Cave	B-General_Concept
Automatic	I-General_Concept
Virtual	I-General_Concept
Environment	I-General_Concept
at	O
the	O
SIGGRAPH	O
'	O
94	O
VROOM	O
event	O
,	O
a	O
demonstration	O
of	O
the	O
state	O
of	O
virtual	O
reality	O
technology	O
.	O
</s>
