<s>
The	O
tub	B-Device
file	I-Device
was	O
a	O
technique	O
used	O
in	O
the	O
punched	B-Architecture
card	I-Architecture
era	O
to	O
speed	O
generation	O
of	O
data	O
files	O
.	O
</s>
<s>
This	O
technique	O
was	O
an	O
early	O
form	O
of	O
random	B-Architecture
access	I-Architecture
memory	I-Architecture
.	O
</s>
<s>
A	O
wholesaler	O
might	O
have	O
a	O
tub	B-Device
file	I-Device
with	O
cards	O
for	O
frequent	O
customers	O
and	O
for	O
each	O
inventory	O
item	O
.	O
</s>
