<s>
Xerox	B-Language
Escape	I-Language
Sequence	I-Language
or	O
XES	O
is	O
a	O
page	O
description	O
language	O
(	O
PDL	O
)	O
developed	O
by	O
Xerox	O
corporation	O
and	O
introduced	O
with	O
their	O
2700	O
laser	O
printers	O
in	O
1982	O
.	O
</s>
<s>
XES	O
offers	O
similar	O
capabilities	O
to	O
Hewlett-Packard	O
'	O
s	O
Printer	B-Language
Command	I-Language
Language	I-Language
(	O
PCL	B-Language
)	O
,	O
which	O
first	O
appeared	O
in	O
1984	O
.	O
</s>
<s>
XES	O
is	O
sometimes	O
known	O
as	O
UDK	O
,	O
from	O
User	O
Defined	O
Key	O
,	O
the	O
character	O
which	O
introduces	O
the	O
printer	O
command	O
,	O
usually	O
the	O
escape	B-Algorithm
character	I-Algorithm
(	O
ESC	O
)	O
.	O
</s>
