<s>
Ambulance	B-Application
or	O
Ambulance	B-Application
Car	O
is	O
a	O
computer	O
virus	O
that	O
infected	O
computers	O
running	O
a	O
DOS	B-Device
operating	O
system	O
in	O
June	O
1990	O
.	O
</s>
<s>
Ambulance	B-Application
does	O
not	O
become	O
memory	O
resident	O
.	O
</s>
<s>
When	O
an	O
infected	O
file	O
is	O
executed	O
,	O
an	O
ASCII	O
art	O
ambulance	B-Application
can	O
be	O
seen	O
moving	O
across	O
the	O
screen	O
,	O
a	O
siren	O
starts	O
to	O
sound	O
,	O
and	O
it	O
displays	O
an	O
alert	O
message	O
such	O
as	O
:	O
BOOM	O
!	O
</s>
<s>
In	O
certain	O
iterations	O
of	O
the	O
virus	O
,	O
the	O
ambulance	B-Application
will	O
only	O
appear	O
once	O
per	O
boot-up	B-Operating_System
.	O
</s>
