<s>
INIT	B-Operating_System
1984	I-Operating_System
is	O
a	O
computer	O
virus	O
that	O
was	O
set	O
up	O
to	O
trigger	O
on	O
Macintosh	O
computers	O
running	O
the	O
classic	B-Application
Mac	I-Application
OS	I-Application
on	O
any	O
given	O
Friday	B-Device
the	I-Device
13th	I-Device
.	O
</s>
<s>
It	O
functions	O
by	O
infecting	O
startup	O
(	O
INIT	B-Operating_System
)	O
files	O
and	O
triggers	O
when	O
the	O
computer	O
is	O
booted	O
on	O
a	O
Friday	B-Device
the	I-Device
13th	I-Device
.	O
</s>
