<s>
SISNE	B-Operating_System
plus	I-Operating_System
is	O
a	O
DOS	B-Device
3.3	O
compatible	O
clone	B-General_Concept
created	O
by	O
Itautec	O
and	O
Scopus	O
Tecnologia	O
in	O
Brazil	O
prior	O
to	O
the	O
end	O
of	O
the	O
Market	O
Reserve	O
in	O
1991	O
,	O
which	O
,	O
at	O
that	O
time	B-Device
,	O
forbade	O
the	O
importation	O
of	O
electronic	O
equipment	O
and	O
software	O
for	B-Language
general	O
use	O
.	O
</s>
<s>
The	O
system	O
was	O
sold	O
with	O
PC/XT	B-Device
compatible	O
Itautec	O
IS	O
30	O
computers	O
and	O
with	O
Itautec	O
IS	O
386	O
computers	O
.	O
</s>
<s>
With	O
the	O
widespread	O
use	O
of	O
MS-DOS	B-Application
after	O
the	O
importations	O
were	O
allowed	O
,	O
the	O
SISNE	B-Operating_System
plus	I-Operating_System
operating	O
system	O
was	O
discontinued	O
.	O
</s>
<s>
Before	O
SISNE	B-Operating_System
plus	I-Operating_System
,	O
Scopus	O
developed	O
and	O
offered	O
SISNE	B-Operating_System
.	O
</s>
<s>
Version	O
1.6	O
was	O
compatible	O
to	O
DOS	B-Device
1.1	O
and	O
had	O
the	O
same	O
user	O
interface	O
as	O
CP/M	B-Application
-80	I-Application
.	O
</s>
<s>
The	O
following	O
list	O
of	O
commands	O
are	O
supported	O
by	O
SISNE	B-Operating_System
plus	I-Operating_System
3.30	O
R05	O
.	O
</s>
