<s>
The	O
Hewlett-Packard	B-Language
Raster	I-Language
Transfer	I-Language
Language	I-Language
(	O
HP	B-Language
RTL	I-Language
)	O
is	O
a	O
subset	O
of	O
the	O
Printer	B-Language
Command	I-Language
Language	I-Language
(	O
PCL	B-Language
)	O
language	O
.	O
</s>
<s>
It	O
is	O
used	O
to	O
embed	O
true	O
raster	O
images	O
(	O
bitmaps	O
)	O
into	O
plotter	B-Operating_System
files	O
.	O
</s>
<s>
Modern	O
plotters	B-Operating_System
(	O
like	O
HP	O
DesignJets	O
)	O
are	O
raster	O
devices	O
,	O
so	O
they	O
need	O
a	O
raster-based	O
language	O
.	O
</s>
<s>
For	O
backward	O
compatibility	O
they	O
also	O
support	O
the	O
HP-GL/2	O
(	O
formerly	O
HP-GL	B-Language
)	O
vector	O
language	O
,	O
so	O
the	O
HP	B-Language
RTL	I-Language
language	O
is	O
designed	O
for	O
mixing	O
with	O
the	O
HP-GL/2	O
language	O
.	O
</s>
