<s>
Acme	B-Application
is	O
a	O
computer	O
virus	O
which	O
infects	O
MS-DOS	O
EXE	O
files	O
.	O
</s>
<s>
Each	O
time	O
an	O
infected	O
file	O
is	O
executed	O
,	O
Acme	B-Application
may	O
infect	O
an	O
EXE	O
in	O
the	O
current	O
directory	O
by	O
creating	O
a	O
hidden	O
247	O
byte	B-Application
long	O
read-only	O
COM	O
file	O
with	O
the	O
same	O
base	O
name	O
.	O
</s>
<s>
(	O
In	O
MS-DOS	O
,	O
if	O
the	O
file	O
extension	O
is	O
not	O
specified	O
,	O
and	O
two	O
files	O
with	O
the	O
same	O
base	O
name	O
exist	O
,	O
one	O
with	O
.COM	O
and	O
one	O
with	O
.EXE	O
,	O
the	O
.COM	O
file	O
will	O
always	O
be	O
executed	O
instead	O
of	O
the	O
.EXE	O
file	O
.	O
)	O
</s>
<s>
Acme	B-Application
is	O
a	O
variant	O
of	O
Clonewar	O
,	O
a	O
spawning	O
virus	O
.	O
</s>
<s>
Acme	B-Application
is	O
also	O
perhaps	O
a	O
descendant	O
of	O
the	O
small	O
single-step	O
infector	O
Zeno	B-Language
,	O
which	O
is	O
not	O
to	O
be	O
confused	O
with	O
the	O
Zeno	B-Language
programming	I-Language
language	I-Language
.	O
</s>
