<s>
Some	O
popular	O
Dell	O
laptop	O
series	O
include	O
the	O
Dell	B-Device
XPS	I-Device
,	O
Dell	B-Device
Inspiron	I-Device
,	O
Dell	B-Device
G	I-Device
Series	I-Device
,	O
and	O
Dell	B-Operating_System
Latitude	I-Operating_System
.	O
</s>
<s>
They	O
also	O
offer	O
different	O
types	O
of	O
keyboards	O
,	O
such	O
as	O
traditional	O
or	O
backlit	O
keyboards	O
,	O
and	O
some	O
models	O
come	O
with	O
additional	O
features	O
like	O
fingerprint	O
readers	O
or	O
face	O
recognition	O
..	O
Dell	O
's	O
premium	O
XPS	B-Device
laptop	O
range	O
was	O
introduced	O
in	O
2007	O
.	O
</s>
