<s>
In	O
computing	O
,	O
a	O
command-line	B-Application
interpreter	O
,	O
or	O
command	O
language	O
interpreter	O
,	O
is	O
a	O
blanket	O
term	O
for	O
a	O
certain	O
class	O
of	O
programs	O
designed	O
to	O
read	O
lines	O
of	O
text	O
entered	O
by	O
a	O
user	O
,	O
thus	O
implementing	O
a	O
command-line	B-Application
interface	I-Application
.	O
</s>
<s>
There	O
are	O
many	O
variants	O
of	O
Unix	B-Application
shell	I-Application
:	O
</s>
<s>
cmd.exe	B-Device
,	O
successor	O
of	O
COMMAND.COM	B-Operating_System
introduced	O
on	O
OS/2	O
and	O
Windows	O
NT	O
systems	O
,	O
although	O
COMMAND.COM	B-Operating_System
is	O
still	O
available	O
in	O
virtual	O
DOS	O
machines	O
on	O
IA-32	O
versions	O
of	O
those	O
operating	O
systems	O
as	O
well	O
.	O
</s>
<s>
sqsh	B-Language
,	O
a	O
shell	O
available	O
with	O
some	O
SQL	B-Language
implementations	O
for	O
database	O
queries	O
and	O
other	O
tasks	O
.	O
</s>
