<s>
Quarantine	B-Application
was	O
an	O
antivirus	B-Application
software	I-Application
from	O
the	O
early	O
90s	O
that	O
automatically	O
isolated	O
infected	O
files	O
on	O
a	O
computer	O
's	O
hard	O
disk	O
.	O
</s>
<s>
Files	O
put	O
in	O
quarantine	B-Application
were	O
then	O
no	O
longer	O
capable	O
of	O
infecting	O
their	O
hosting	O
system	O
.	O
</s>
<s>
In	O
December	O
,	O
1988	O
,	O
shortly	O
after	O
the	O
Morris	O
Worm	O
,	O
work	O
started	O
on	O
Quarantine	B-Application
,	O
an	O
anti-malware	B-Application
and	O
file	O
reliability	O
product	O
.	O
</s>
<s>
Released	O
in	O
April	O
,	O
1989	O
,	O
Quarantine	B-Application
was	O
the	O
first	O
such	O
product	O
to	O
use	O
file	B-General_Concept
signature	I-General_Concept
instead	O
of	O
viral	O
signature	O
methods	O
.	O
</s>
<s>
The	O
original	O
Quarantine	B-Application
used	O
Hunt	O
's	O
B-tree	B-Architecture
database	O
of	O
files	O
with	O
both	O
their	O
CRC16	O
and	O
CRC-CCITT	O
signatures	O
.	O
</s>
<s>
Quarantine	B-Application
allowed	O
system	O
managers	O
to	O
track	O
all	O
modifications	O
of	O
a	O
selected	O
files	O
or	O
file	O
structures	O
,	O
hence	O
Quarantine	B-Application
users	O
also	O
got	O
early	O
warnings	O
of	O
failing	O
disks	O
or	O
disk	O
interface	O
cards	O
.	O
</s>
<s>
In	O
1990	O
Quarantine	B-Application
received	O
the	O
LAN	O
Magazine	O
,	O
Best	O
of	O
Year	O
,	O
Security	O
award	O
.	O
</s>
<s>
In	O
that	O
year	O
"	O
Quarantine	B-Application
"	O
was	O
reportedly	O
responsible	O
for	O
finding	O
the	O
first	O
stealth	O
virus	O
at	O
the	O
University	O
of	O
Toronto	O
,	O
when	O
all	O
pattern	O
matching	O
virus	O
detectors	O
had	O
failed	O
.	O
</s>
<s>
The	O
efforts	O
and	O
expenses	O
to	O
convert	O
Quarantine	B-Application
to	O
other	O
platforms	O
went	O
unrewarded	O
as	O
Tripwire	B-Application
's	O
1991	O
copy	O
of	O
Quarantine	B-Application
for	O
*	O
nix	O
was	O
better	O
funded	O
and	O
publicized	O
than	O
OnDisk	O
could	O
afford	O
to	O
match	O
.	O
</s>
<s>
Quarantine	B-Application
stopped	O
shipping	O
in	O
1994	O
.	O
</s>
