<s>
An	O
aircraft	B-Application
seat	I-Application
map	I-Application
or	O
seating	O
chart	O
is	O
a	O
diagram	O
of	O
the	O
seat	O
layout	O
inside	O
a	O
passenger	O
airliner	O
.	O
</s>
<s>
When	O
passengers	O
complete	O
an	O
online	O
booking	O
,	O
or	O
check	O
in	O
online	O
,	O
they	O
are	O
often	O
also	O
presented	O
with	O
an	O
aircraft	B-Application
seat	I-Application
map	I-Application
.	O
</s>
<s>
However	O
,	O
this	O
data	O
is	O
typically	O
sourced	O
from	O
the	O
original	O
text-only	O
seat	O
maps	O
on	O
computer	O
reservation	O
systems	O
such	O
as	O
Sabre	B-Application
,	O
where	O
the	O
seat	O
map	O
is	O
simply	O
held	O
as	O
a	O
two-dimensional	O
array	O
and	O
as	O
such	O
can	O
only	O
display	O
a	O
grid	O
of	O
seats	O
,	O
as	O
opposed	O
to	O
the	O
more	O
varied	O
layouts	O
now	O
used	O
in	O
first	O
and	O
business	O
class	O
.	O
</s>
<s>
In	O
addition	O
to	O
those	O
published	O
seat	O
maps	O
which	O
can	O
be	O
found	O
on	O
airline	O
websites	O
,	O
there	O
are	O
some	O
other	O
websites	O
that	O
publish	O
aircraft	B-Application
seat	I-Application
maps	I-Application
for	O
almost	O
all	O
commercial	O
carriers	O
.	O
</s>
