<s>
YSFlight	B-Application
is	O
a	O
free	B-License
,	O
open-source	B-Application
multi-platform	B-Operating_System
flight	B-Application
simulator	I-Application
,	O
developed	O
and	O
published	O
by	O
Soji	O
Yamakawa	O
since	O
1999	O
.	O
</s>
<s>
Development	O
of	O
YSFlight	B-Application
began	O
in	O
1998	O
as	O
a	O
solo	O
project	O
by	O
Soji	O
Yamakawa	O
.	O
</s>
<s>
Initially	O
designed	O
to	O
be	O
run	O
by	O
lower-end	O
computers	O
,	O
the	O
flight	B-Application
simulator	I-Application
began	O
to	O
implement	O
more	O
updated	O
graphical	O
features	O
with	O
its	O
2015	O
release	O
.	O
</s>
<s>
On	O
August	O
19th	O
,	O
2022	O
,	O
Yamakawa	O
published	O
YSFlight	B-Application
's	O
source	O
code	O
and	O
assets	O
to	O
GitHub	B-Application
under	O
the	O
BSD-3-Clause	B-Operating_System
license	O
,	O
while	O
stating	O
that	O
he	O
intends	O
to	O
continue	O
the	O
simulator	O
's	O
development	O
.	O
</s>
<s>
YSFlight	B-Application
differs	O
from	O
other	O
simulators	O
,	O
such	O
as	O
the	O
Microsoft	B-Operating_System
Flight	I-Operating_System
Simulator	I-Operating_System
series	O
,	O
in	O
its	O
intentionally	O
low-detail	O
graphical	O
design	O
.	O
</s>
<s>
This	O
allows	O
the	O
simulator	O
to	O
be	O
run	O
by	O
lower-end	O
computers	O
,	O
with	O
system	O
requirements	O
being	O
much	O
less	O
than	O
most	O
other	O
flight	B-Application
simulators	I-Application
.	O
</s>
<s>
It	O
allows	O
for	O
to	O
YSFlight	B-Application
clients	O
to	O
join	O
a	O
multiplayer	O
server	O
.	O
</s>
