<s>
The	O
bomb	B-Device
icon	O
( 💣	O
)	O
has	O
several	O
different	O
applications	O
in	O
computing	O
,	O
and	O
typically	O
indicates	O
a	O
fatal	B-Error_Name
system	I-Error_Name
error	I-Error_Name
.	O
</s>
<s>
The	O
bomb	B-Device
icon	O
in	O
Mac	B-Application
OS	I-Application
is	O
a	O
symbol	O
designed	O
by	O
Susan	O
Kare	O
that	O
was	O
displayed	O
inside	O
the	O
System	O
Error	O
alert	O
box	O
when	O
the	O
"	B-Application
classic	I-Application
"	I-Application
Macintosh	I-Application
operating	I-Application
system	I-Application
had	O
a	O
crash	B-General_Concept
which	O
the	O
system	O
decided	O
was	O
unrecoverable	O
.	O
</s>
<s>
Since	O
the	O
classic	B-Application
Mac	I-Application
OS	I-Application
offered	O
little	O
memory	B-General_Concept
protection	I-General_Concept
,	O
an	O
application	B-General_Concept
crash	I-General_Concept
would	O
often	O
take	O
down	O
the	O
entire	O
system	O
.	O
</s>
<s>
The	O
bomb	B-Device
symbol	O
first	O
appeared	O
on	O
the	O
original	O
Macintosh	O
in	O
1984	O
.	O
</s>
<s>
Often	O
,	O
a	O
reason	O
for	O
the	O
crash	B-General_Concept
,	O
including	O
the	O
error	O
code	O
,	O
was	O
displayed	O
in	O
the	O
dialog	O
.	O
</s>
<s>
This	O
was	O
helped	O
by	O
the	O
classic	B-Application
Mac	I-Application
OS	I-Application
providing	O
a	O
little	O
bit	O
of	O
protection	O
against	O
heap	B-General_Concept
corruption	O
using	O
guard	B-Error_Name
pages	I-Error_Name
;	O
if	O
the	O
application	O
was	O
to	O
crash	B-General_Concept
and	O
the	O
application	O
's	O
heap	B-General_Concept
was	O
corrupt	O
,	O
it	O
could	O
be	O
thrown	O
away	O
.	O
</s>
<s>
The	O
debugger	B-Application
program	O
MacsBug	B-Operating_System
was	O
sometimes	O
used	O
even	O
by	O
end	O
users	O
to	O
provide	O
basic	O
(	O
though	O
not	O
always	O
reliable	O
)	O
error	O
recovery	O
,	O
and	O
could	O
be	O
used	O
for	O
troubleshooting	O
purposes	O
,	O
much	O
as	O
the	O
output	O
of	O
a	O
Unix	B-Application
kernel	B-Operating_System
panic	I-Operating_System
or	O
a	O
Windows	B-Device
NT	I-Device
Blue	O
Screen	O
of	O
Death	O
could	O
be	O
.	O
</s>
<s>
Mac	B-Application
OS	I-Application
Classic	I-Application
bomb	B-Device
boxes	O
were	O
often	O
ridiculed	O
for	O
providing	O
little	O
or	O
no	O
useful	O
information	O
about	O
the	O
error	O
;	O
this	O
was	O
a	O
conscious	O
decision	O
by	O
the	O
Macintosh	O
team	O
to	O
eliminate	O
any	O
information	O
that	O
the	O
end	O
user	O
could	O
not	O
make	O
sense	O
of	O
.	O
</s>
<s>
The	O
error	O
code	O
was	O
intended	O
to	O
be	O
included	O
in	O
a	O
bug	B-Application
report	I-Application
to	O
the	O
developer	O
.	O
</s>
<s>
In	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
,	O
the	O
system	O
architecture	O
is	O
vastly	O
different	O
from	O
that	O
in	O
the	O
classic	B-Application
Mac	I-Application
OS	I-Application
,	O
and	O
an	O
application	B-General_Concept
crash	I-General_Concept
cannot	O
usually	O
bring	O
down	O
the	O
entire	O
system	O
.	O
</s>
<s>
A	O
kernel	B-Operating_System
panic	I-Operating_System
screen	O
(	O
either	O
text	O
overwritten	O
on	O
the	O
screen	O
in	O
older	O
versions	O
,	O
or	O
simplified	O
to	O
a	O
reboot	O
message	O
in	O
more	O
recent	O
versions	O
)	O
replaces	O
the	O
bomb	B-Device
symbol	O
but	O
appears	O
less	O
often	O
due	O
to	O
the	O
radically	O
different	O
system	O
architecture	O
.	O
</s>
<s>
The	O
bomb	B-Device
symbol	O
is	O
not	O
used	O
in	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
,	O
but	O
a	O
test	O
application	O
called	O
Bomb.app	O
,	O
specifically	O
written	O
to	O
cause	O
a	O
non-fatal	O
crash	B-General_Concept
,	O
is	O
included	O
with	O
Xcode	B-Operating_System
and	O
uses	O
a	O
rendition	O
of	O
the	O
bomb	B-Device
symbol	O
as	O
its	O
icon	O
.	O
</s>
<s>
In	O
the	O
original	O
Mac	B-Application
OS	I-Application
,	O
the	O
system	B-Operating_System
call	I-Operating_System
to	O
display	O
a	O
"	O
bomb	B-Device
box	O
"	O
was	O
called	O
DSError	O
,	O
for	O
"	O
Deep	O
Shit	O
"	O
.	O
</s>
<s>
TOS-based	O
systems	O
,	O
such	O
as	O
the	O
Atari	B-Device
ST	I-Device
,	O
used	O
a	O
row	B-Device
of	I-Device
bombs	I-Device
to	O
indicate	O
a	O
critical	O
system	O
error	O
.	O
</s>
<s>
The	O
number	O
of	O
bombs	B-Device
displayed	O
revealed	O
information	O
about	O
the	O
occurred	O
error	O
.	O
</s>
<s>
The	O
error	O
(	O
also	O
called	O
an	O
exception	B-General_Concept
)	O
is	O
reported	O
by	O
the	O
Motorola	B-Device
68000	I-Device
microprocessor	I-Device
.	O
</s>
<s>
The	O
first	O
version	O
of	O
TOS	B-Application
used	O
mushroom	O
clouds	O
.	O
</s>
<s>
Bomb	B-Device
emoji	O
was	O
added	O
to	O
Miscellaneous	B-Protocol
Symbols	I-Protocol
and	I-Protocol
Pictographs	I-Protocol
character	O
block	O
in	O
Unicode	O
version	O
6.0	O
with	O
code	O
point	O
.	O
</s>
