<s>
Microsoft	B-Operating_System
Flight	I-Operating_System
Simulator	I-Operating_System
,	O
commonly	O
known	O
as	O
Microsoft	B-Application
Flight	I-Application
Simulator	I-Application
4.0	I-Application
or	O
FS4	O
,	O
is	O
a	O
1989	O
video	O
game	O
developed	O
by	O
Bruce	O
Artwick	O
Organization	O
and	O
published	O
by	O
Microsoft	O
.	O
</s>
<s>
Microsoft	B-Application
Flight	I-Application
Simulator	I-Application
4.0	I-Application
is	O
a	O
game	O
in	O
which	O
the	O
ability	O
to	O
adjust	O
flight	O
characteristics	O
and	O
create	O
experimental	O
aircraft	O
are	O
among	O
the	O
new	O
features	O
added	O
.	O
</s>
<s>
The	O
basic	O
version	O
of	O
FS4	O
was	O
available	O
for	O
Macintosh	B-Device
computers	O
in	O
1991	O
.	O
</s>
<s>
Like	O
FS3	B-Application
,	O
this	O
version	O
included	O
an	O
upgraded	O
converter	O
for	O
the	O
old	O
Sublogic	O
Scenery	O
Disks	O
into	O
SCN	O
files	O
.	O
</s>
<s>
A	O
variety	O
of	O
high	O
resolution	O
modes	O
also	O
became	O
available	O
for	O
specific	O
types	O
of	O
higher	O
end	O
video	O
cards	O
and	O
chipsets	O
,	O
thus	O
supplying	O
running	O
resolutions	O
up	O
to	O
800	B-General_Concept
×	I-General_Concept
600	I-General_Concept
.	O
</s>
<s>
The	O
first	O
,	O
the	O
Aircraft	O
Factory	O
,	O
was	O
a	O
Windows-based	O
program	O
allowing	O
custom	O
design	O
aircraft	O
shapes	O
to	O
be	O
used	O
within	O
FS4	O
utilizing	O
a	O
CAD-type	O
interface	O
,	O
supported	O
by	O
various	O
sub	O
menu	O
and	O
listing	O
options	O
.	O
</s>
