<s>
Acid	B-Application
is	O
a	O
computer	O
virus	O
which	O
infects	O
.COM	O
and	O
.EXE	O
files	O
including	O
.	O
</s>
<s>
Each	O
time	O
an	O
infected	O
file	O
is	O
executed	O
,	O
Acid	B-Application
infects	O
all	O
of	O
the	O
.EXE	O
files	O
in	O
the	O
current	O
directory	B-Application
.	O
</s>
<s>
Later	O
,	O
if	O
an	O
infected	O
file	O
is	O
executed	O
,	O
it	O
infects	O
the	O
.COM	O
files	O
in	O
the	O
current	O
directory	B-Application
.	O
</s>
<s>
Programs	O
infected	O
with	O
Acid	B-Application
will	O
have	O
had	O
the	O
first	O
792	O
bytes	B-Application
of	O
the	O
host	O
program	O
overwritten	O
with	O
Acid	B-Application
's	O
own	O
code	O
.	O
</s>
<s>
There	O
will	O
be	O
no	O
file	O
length	O
increase	O
unless	O
the	O
original	O
host	O
program	O
was	O
smaller	O
than	O
792	O
bytes	B-Application
,	O
in	O
which	O
case	O
it	O
will	O
become	O
792	O
bytes	B-Application
in	O
length	O
.	O
</s>
<s>
The	O
program	O
's	O
date	O
and	O
time	O
in	O
the	O
DOS	B-Device
disk	O
directory	B-Application
listing	O
will	O
not	O
be	O
altered	O
.	O
</s>
<s>
"	O
*	O
.EXE	O
*	O
.COM	O
..	B-Application
"	O
</s>
