<s>
In	O
transaction	B-General_Concept
processing	I-General_Concept
,	O
a	O
pseudoconversational	B-Application
transaction	I-Application
is	O
a	O
type	O
of	O
transaction	O
that	O
emulates	O
a	O
true	O
conversation	O
in	O
an	O
interactive	B-General_Concept
session	B-Protocol
.	O
</s>
<s>
A	O
single	O
control	B-General_Concept
variable	I-General_Concept
is	O
usually	O
retained	O
to	O
hold	O
the	O
current	O
state	O
in	O
terms	O
of	O
the	O
stage	O
of	O
input	O
reached	O
(	O
and	O
therefore	O
what	O
must	O
be	O
recovered	O
at	O
any	O
stage	O
in	O
order	O
to	O
resume	O
processing	O
)	O
.	O
</s>
<s>
The	O
state	O
,	O
including	O
the	O
control	B-General_Concept
variable	I-General_Concept
,	O
is	O
usually	O
preserved	O
in	O
a	O
'	O
temporary	O
storage	O
record	O
 '	O
that	O
maps	O
the	O
variables	O
needing	O
restoration	O
as	O
an	O
aggregate	O
set	O
,	O
usually	O
contained	O
in	O
a	O
single	O
structure	O
(	O
other	O
variables	O
will	O
be	O
re-initialized	O
on	O
restart	O
)	O
.	O
</s>
<s>
This	O
method	O
of	O
programming	O
frees	O
up	O
pooled	O
resources	O
(	O
such	O
as	O
memory	B-Architecture
)	O
for	O
an	O
indeterminate	O
time	O
.	O
</s>
<s>
For	O
systems	O
supporting	O
many	O
thousands	O
of	O
users	O
on	O
a	O
single	O
processor	O
,	O
it	O
allows	O
the	O
transparent	O
'	O
look	O
and	O
feel	O
 '	O
of	O
a	O
true	O
conversational	O
session	B-Protocol
without	O
tying	O
up	O
limited	O
resources	O
.	O
</s>
