<s>
Celsius	B-Operating_System
is	O
the	O
codename	O
for	O
a	O
GPU	O
microarchitecture	B-General_Concept
developed	O
by	O
Nvidia	O
,	O
and	O
released	O
in	O
1999	O
,	O
as	O
the	O
successor	O
to	O
Fahrenheit	B-Operating_System
(	O
NV4	O
,	O
NV3	O
...	O
)	O
microarchitecture	B-General_Concept
.	O
</s>
<s>
It	O
was	O
named	O
with	O
reference	O
to	O
Celsius	B-Operating_System
and	O
used	O
with	O
the	O
GeForce	B-Device
256	I-Device
and	O
GeForce	O
2	O
series	O
.	O
</s>
