<s>
5lo	B-Application
is	O
a	O
computer	O
virus	O
that	O
increases	O
file	O
size	O
and	O
does	O
little	O
more	O
than	O
replicate	O
.	O
</s>
<s>
5lo	B-Application
infects	O
resident	O
.EXE	O
files	O
only	O
.	O
</s>
<s>
5lo	B-Application
stays	O
resident	O
.	O
</s>
<s>
Whenever	O
a	O
.EXE	O
file	O
is	O
run	O
,	O
5lo	B-Application
will	O
infect	O
it	O
(	O
and	O
another	O
.EXE	O
file	O
)	O
.	O
</s>
<s>
5lo	B-Application
appends	O
its	O
code	O
into	O
infected	O
files	O
.	O
</s>
<s>
When	O
5lo	B-Application
is	O
running	O
in	O
memory	O
,	O
it	O
is	O
n't	O
discoverable	O
by	O
typing	O
in	O
MEM	O
/C	O
.	O
</s>
