<s>
A	O
BANG	O
file[1]( balanced	O
and	O
nested	O
grid	B-Data_Structure
file	I-Data_Structure
)	O
is	O
a	O
point	O
access	O
method	O
which	O
divides	O
space	O
into	O
a	O
nonperiodic	O
grid	O
.	O
</s>
<s>
In	O
some	O
early	O
ICL	O
mainframe	B-Architecture
computers	I-Architecture
,	O
a	O
bang	B-Data_Structure
file	I-Data_Structure
was	O
a	O
temporary	O
data	O
storage	O
file	O
whose	O
name	O
began	O
with	O
a	O
!	B-Device
</s>
