<s>
A	O
terminal	B-General_Concept
pager	I-General_Concept
,	O
paging	O
program	O
or	O
simply	O
pager	O
is	O
a	O
computer	B-Application
program	I-Application
used	O
to	O
view	O
(	O
but	O
not	O
modify	O
)	O
the	O
contents	O
of	O
a	O
text	B-General_Concept
file	I-General_Concept
moving	O
down	O
the	O
file	O
one	O
line	O
or	O
one	O
screen	O
at	O
a	O
time	O
.	O
</s>
<s>
A	O
popular	O
cross-platform	B-Operating_System
terminal	B-General_Concept
pager	I-General_Concept
is	O
more	B-Device
,	O
which	O
can	O
move	O
forwards	O
and	O
backwards	O
in	O
text	B-General_Concept
files	I-General_Concept
but	O
cannot	O
move	O
backwards	O
in	O
pipes	B-Operating_System
.	O
</s>
<s>
less	B-Application
is	O
a	O
more	B-Device
advanced	O
pager	O
that	O
allows	O
movement	O
forward	O
and	O
backward	O
,	O
and	O
contains	O
extra	O
functions	O
such	O
as	O
search	O
.	O
</s>
<s>
Some	O
programs	O
incorporate	O
their	O
own	O
paging	O
function	O
,	O
for	O
example	O
bash	B-Operating_System
's	O
tab	O
completion	O
function	O
.	O
</s>
