<s>
iS-DOS	B-Operating_System
is	O
a	O
disk	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
(	O
DOS	O
)	O
for	O
Soviet/Russian	O
ZX	B-Operating_System
Spectrum	I-Operating_System
clones	O
.	O
</s>
<s>
iS-DOS	B-Operating_System
was	O
developed	O
in	O
1990	O
or	O
1991	O
,	O
by	O
Iskra	O
Soft	O
,	O
in	O
Leningrad	O
,	O
Soviet	O
Union	O
,	O
now	O
Saint	O
Petersburg	O
,	O
Russia	O
.	O
</s>
<s>
It	O
handles	O
floppy	B-Device
disks	I-Device
(	O
double	O
sided	O
,	O
double	O
density	O
)	O
,	O
hard	B-Device
disk	I-Device
drives	I-Device
,	O
and	O
CD-ROMs	B-Device
.	O
</s>
<s>
Maximum	O
iS-DOS	B-Operating_System
disk	B-Application
partitioning	I-Application
size	O
on	O
a	O
hard	B-Device
disk	I-Device
is	O
16	O
MiB	O
.	O
</s>
<s>
Unlike	O
TR-DOS	B-Operating_System
,	O
iS-DOS	B-Operating_System
is	O
resident	O
in	O
random-access	B-Architecture
memory	I-Architecture
(	O
RAM	B-Architecture
)	O
,	O
and	O
thus	O
reduces	O
the	O
amount	O
of	O
memory	O
available	O
for	O
user	O
programs	O
.	O
</s>
<s>
iS-DOS	B-Operating_System
Chic	O
is	O
a	O
version	O
developed	O
for	O
the	O
Nemo	B-Device
KAY	I-Device
.	O
</s>
<s>
TASiS	B-Operating_System
,	O
based	O
on	O
iS-DOS	B-Operating_System
Chic	O
,	O
is	O
a	O
modern	O
version	O
developed	O
by	O
NedoPC	O
for	O
the	O
ATM	B-Device
Turbo	I-Device
2+	I-Device
in	O
2006	O
,	O
supports	O
the	O
enhanced	O
text	O
mode	O
and	O
larger	O
memory	O
of	O
that	O
model	O
.	O
</s>
<s>
Slot	O
Ltd	O
.	O
(	O
Moscow	O
)	O
distributed	O
iS-DOS	B-Operating_System
in	O
Moscow	O
and	O
regions	O
in	O
1990s	O
,	O
and	O
issued	O
paper	O
books	O
.	O
</s>
<s>
Nemo	O
(	O
Saint	O
Petersburg	O
)	O
distributed	O
iS-DOS	B-Operating_System
in	O
ex-USSR	O
until	O
2004	O
,	O
and	O
issued	O
Open	O
Letters	O
electronic	O
press	O
.	O
</s>
<s>
iS-DOS	B-Operating_System
Support	O
Team	O
(	O
Saratov	O
Oblast	O
)	O
distributes	O
iS-DOS	B-Operating_System
in	O
ex-USSR	O
and	O
issues	O
iS-Files	O
electronic	O
press	O
.	O
</s>
<s>
NedoPC	O
distributes	O
TASiS	B-Operating_System
as	O
freeware	B-License
.	O
</s>
<s>
"	O
iS-DOS	B-Operating_System
.	O
</s>
<s>
"	O
Операционная	O
система	O
IS-DOS	B-Operating_System
для	O
ZX-SPECTRUM	B-Operating_System
.	O
</s>
