<s>
Professional	B-Application
Ski	I-Application
Simulator	I-Application
is	O
an	O
isometric	O
3D	O
sports	O
simulation	O
game	O
released	O
by	O
Codemasters	O
in	O
1987	B-Application
for	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
,	O
Commodore	O
64	O
,	O
and	O
Amstrad	B-Device
CPC	I-Device
.	O
</s>
<s>
It	O
was	O
later	O
released	O
for	O
the	O
Atari	B-Device
ST	I-Device
and	O
Amiga	B-Device
as	O
Advanced	B-Application
Ski	I-Application
Simulator	I-Application
.	O
</s>
<s>
Sinclair	O
User	O
wrote	O
in	O
1987	B-Application
:	O
</s>
