<s>
The	O
IBM	O
Storage	O
and	O
Information	O
Retrieval	O
System	O
,	O
better	O
known	O
by	O
the	O
acronym	O
STAIRS	O
,	O
was	O
a	O
program	O
providing	O
storage	O
and	O
online	O
free-text	B-Application
search	I-Application
of	O
text	O
data	O
.	O
</s>
<s>
STAIRS	O
ran	O
under	O
the	O
OS/360	B-Application
operating	O
system	O
under	O
the	O
CICS	B-Application
or	O
IMS	B-Application
transaction	O
monitors	O
,	O
and	O
supported	O
IBM	B-Operating_System
3270	I-Operating_System
display	O
terminals	O
.	O
</s>
<s>
Originally	O
the	O
product	O
was	O
called	O
simply	O
STAIRS	O
but	O
,	O
with	O
the	O
advent	O
of	O
IBM	O
's	O
"	O
/Virtual	B-Architecture
Storage	I-Architecture
"	O
operating	O
systems	O
(	O
such	O
as	O
OS/VS1	B-Application
)	O
,	O
the	O
non-CMS	O
versions	O
were	O
later	O
renamed	O
to	O
STAIRS/VS	O
.	O
</s>
<s>
STAIRS	O
was	O
initially	O
released	O
as	O
an	O
application	O
running	O
under	O
IMS	B-Application
and	O
CICS	B-Application
,	O
but	O
a	O
VM/CMS	B-Application
implementation	O
was	O
developed	O
by	O
IBM	O
Canada	O
in	O
the	O
late	O
1970s	O
and	O
marketed	O
mostly	O
in	O
Europe	O
,	O
called	O
STAIRS/CMS	O
.	O
</s>
<s>
When	O
search	O
results	O
were	O
displayed	O
for	O
the	O
user	O
,	O
3270	B-Operating_System
highlighting	O
was	O
used	O
to	O
emphasize	O
occurrences	O
of	O
search	O
terms	O
.	O
</s>
<s>
The	O
data	O
(	O
in	O
the	O
non-CMS	O
implementations	O
)	O
was	O
stored	O
in	O
basic	B-Application
direct	I-Application
access	I-Application
method	I-Application
(	O
BDAM	B-Application
)	O
files	O
,	O
which	O
caused	O
upgrade	O
and	O
portability	O
problems	O
later	O
in	O
its	O
life-cycle	O
.	O
</s>
