<s>
Utah	B-Language
GLX	I-Language
was	O
a	O
project	O
aimed	O
at	O
creating	O
a	O
fully	O
free	B-License
and	I-License
open-source	I-License
basic	O
hardware-accelerated	O
3D	O
renderer	O
using	O
the	O
OpenGL	B-Application
rendering	O
API	O
on	O
Linux	O
kernel-based	O
operating	O
systems	O
.	O
</s>
<s>
Utah	B-Language
GLX	I-Language
predates	O
Direct	B-Application
Rendering	I-Application
Infrastructure	I-Application
,	O
which	O
is	O
what	O
is	O
used	O
as	O
of	O
2014	O
.	O
</s>
<s>
John	O
D	O
.	O
Carmack	O
worked	O
on	O
Utah	B-Language
GLX	I-Language
.	O
</s>
