<s>
DC100	B-Operating_System
(	O
also	O
known	O
as	O
DC100A	O
)	O
is	O
a	O
tape	O
cartridge	O
format	O
that	O
was	O
co-developed	O
by	O
Hewlett-Packard	O
and	O
3M	O
.	O
</s>
<s>
Introduced	O
in	O
mid-1976	O
,	O
it	O
was	O
developed	O
as	O
a	O
data	O
storage	O
mechanism	O
for	O
the	O
HP	B-Device
9820	I-Device
programmable	O
calculator	O
.	O
</s>
<s>
The	O
DC100	B-Operating_System
tape	O
cartridge	O
was	O
a	O
scaled-down	O
version	O
of	O
the	O
DC300	B-Device
cartridge	O
pioneered	O
by	O
3M	O
,	O
and	O
represents	O
an	O
early	O
version	O
of	O
what	O
is	O
now	O
referred	O
to	O
as	O
the	O
QIC	O
Mini	O
Cartridge	O
.	O
</s>
<s>
3M	O
was	O
the	O
exclusive	O
source	O
of	O
DC100	B-Operating_System
tapes	O
,	O
while	O
drives	O
were	O
manufactured	O
by	O
3M	O
and	O
several	O
third	O
parties	O
.	O
</s>
<s>
The	O
DC100	B-Operating_System
tape	O
cartridge	O
format	O
was	O
used	O
in	O
the	O
HP	O
desktop	O
calculator	O
and	O
computer	O
systems	O
of	O
the	O
late	O
1970s	O
and	O
early	O
1980s	O
,	O
including	O
the	O
9815	O
,	O
9825	O
,	O
9845	O
,	O
and	O
HP	B-Device
series	I-Device
80	I-Device
.	O
</s>
<s>
HP	O
also	O
used	O
it	O
in	O
their	O
2640	B-General_Concept
series	O
of	O
computer	O
terminals	O
.	O
</s>
<s>
Bucking	O
this	O
trend	O
,	O
Computer	O
Automation	O
's	O
LSI-2	O
minicomputers	O
saw	O
compatibility	O
with	O
the	O
DC100	B-Operating_System
format	O
with	O
the	O
release	O
of	O
the	O
TDCA-100	O
tape	O
transport	O
system	O
by	O
Telegenix	O
in	O
1981	O
.	O
</s>
<s>
In	O
1984	O
,	O
Irwin	O
Magnetic	O
Systems	O
introduced	O
the	O
Irwin	O
210	O
tape	O
backup	O
unit	O
for	O
various	O
platforms	O
that	O
used	O
DC100	B-Operating_System
tape	O
.	O
</s>
<s>
Digital	O
Equipment	O
Corporation	O
's	O
DC150	O
cartridge	O
,	O
a	O
variation	O
of	O
DC100	B-Operating_System
with	O
slightly	O
higher	O
capacity	O
,	O
was	O
used	O
in	O
DEC	O
's	O
DECtape	O
II	O
drives	O
.	O
</s>
<s>
HP	O
later	O
developed	O
the	O
DC200	O
tape	O
cartridge	O
format	O
on	O
their	O
own	O
;	O
it	O
was	O
based	O
on	O
the	O
design	O
of	O
the	O
DC100	B-Operating_System
but	O
used	O
thinner	O
tape	O
to	O
increase	O
the	O
amount	O
of	O
data	O
over	O
its	O
predecessor	O
.	O
</s>
