<s>
pg	B-Operating_System
is	O
a	O
terminal	B-General_Concept
pager	I-General_Concept
program	O
on	O
Unix	B-Application
and	O
Unix-like	B-Operating_System
systems	I-Operating_System
for	O
viewing	O
text	B-General_Concept
files	I-General_Concept
.	O
</s>
<s>
It	O
can	O
also	O
be	O
used	O
to	O
page	O
through	O
the	O
output	O
of	O
a	O
command	O
via	O
a	O
pipe	B-Operating_System
.	O
</s>
<s>
pg	B-Operating_System
uses	O
an	O
interface	O
similar	O
to	O
vi	B-Application
,	O
but	O
commands	O
are	O
different	O
.	O
</s>
<s>
As	O
of	O
2018	O
,	O
pg	B-Operating_System
has	O
been	O
removed	O
from	O
the	O
POSIX	O
specification	O
,	O
but	O
is	O
still	O
included	O
in	O
util-linux	B-Application
.	O
</s>
<s>
Users	O
are	O
expected	O
to	O
use	O
other	O
paging	O
programs	O
,	O
such	O
as	O
more	B-Device
,	O
less	B-Application
or	O
most	B-Operating_System
.	O
</s>
<s>
pg	B-Operating_System
is	O
the	O
name	O
of	O
the	O
historical	O
utility	O
on	O
BSD	O
UNIX	B-Application
systems	I-Application
.	O
</s>
<s>
It	O
was	O
written	O
to	O
address	O
the	O
limit	O
of	O
the	O
historical	O
more	B-Device
command	O
not	O
being	O
able	O
to	O
traverse	O
the	O
input	O
backward	O
.	O
</s>
<s>
Eventually	O
that	O
ability	O
was	O
added	O
also	O
to	O
more	B-Device
,	O
so	O
both	O
are	O
quite	O
similar	O
.	O
</s>
