<s>
Airfight	B-Application
is	O
an	O
early	O
3D	O
graphics-based	O
multi-user	O
flight	B-Application
simulator	I-Application
,	O
created	O
on	O
the	O
University	O
of	O
Illinois	O
Urbana-Champaign	O
(	O
UIUC	O
)	O
Control	O
Data	O
Corporation	O
(	O
CDC	O
)	O
PLATO	B-Operating_System
system	I-Operating_System
in	O
the	O
early	O
1970s	O
.	O
</s>
<s>
The	O
software	O
was	O
the	O
first	O
ever	O
3D	O
flight	B-Application
simulator	I-Application
and	O
the	O
first	O
multi-player	O
flight	B-Application
simulator	I-Application
.	O
</s>
<s>
After	O
its	O
release	O
,	O
it	O
became	O
the	O
most	O
popular	O
game	O
on	O
PLATO	B-Operating_System
until	O
Empire	B-Application
became	O
more	O
popular	O
.	O
</s>
<s>
This	O
software	O
probably	O
inspired	O
the	O
UIUC	O
student	O
Bruce	O
Artwick	O
to	O
start	O
the	O
company	O
Sublogic	O
,	O
which	O
was	O
acquired	O
and	O
later	O
became	O
Microsoft	B-Operating_System
Flight	I-Operating_System
Simulator	I-Operating_System
.	O
</s>
