<s>
System	B-Language
2000	I-Language
(	O
S2K	O
)	O
is	O
a	O
hierarchical	B-General_Concept
database	I-General_Concept
management	I-General_Concept
system	I-General_Concept
(	O
DBMS	O
)	O
.	O
</s>
<s>
Although	O
not	O
a	O
relational	B-Application
database	I-Application
,	O
S2K	O
does	O
have	O
SQL	B-Language
support	I-Language
.	O
</s>
<s>
System	B-Language
2000	I-Language
originated	O
as	O
software	O
for	O
the	O
IBM	O
mainframe	O
environment	O
.	O
</s>
<s>
It	O
could	O
operate	O
in	O
batch	O
processing	O
mode	O
or	O
be	O
used	O
via	O
CICS	B-Application
.	O
</s>
<s>
It	O
competed	O
with	O
Cincom	B-Application
's	O
Total	O
,	O
Software	O
AG	O
's	O
ADABAS	B-Application
,	O
Applied	B-Operating_System
Data	I-Operating_System
Research	I-Operating_System
's	O
DATACOM/DB	B-Application
,	O
Computer	O
Corporation	O
of	O
America	O
's	O
Model	B-Application
204	I-Application
,	O
and	O
IBM	B-Application
Information	I-Application
Management	I-Application
System	I-Application
(	O
IMS	O
)	O
and	O
DL/I	B-Language
.	O
</s>
<s>
Unisys	O
and	O
CDC	O
versions	O
were	O
subsequently	O
released	O
,	O
as	O
was	O
an	O
interface	O
to	O
SAS	B-Language
.	O
</s>
<s>
Programmers	O
could	O
access	O
its	O
Data	B-Language
manipulation	I-Language
language	I-Language
(	O
DML	O
)	O
via	O
a	O
precompiler	B-Application
;	O
these	O
existed	O
for	O
COBOL	O
,	O
FORTRAN	O
,	O
and	O
ASSEMBLY	O
Language	O
.	O
</s>
<s>
Statements	O
written	O
in	O
S2K	O
's	O
Procedural	O
Language	O
could	O
be	O
intermixed	O
with	O
these	O
languages	O
:	O
the	O
3	O
character	O
code	O
"	O
*	O
PL	O
"	O
(	O
in	O
columns	O
1-3	O
)	O
identified	O
these	O
statements	O
as	O
intended	O
for	O
the	O
precompiler	B-Application
(	O
also	O
referred	O
to	O
as	O
a	O
preprocessor	B-Application
)	O
.	O
</s>
<s>
System	B-Language
2000	I-Language
was	O
developed	O
in	O
1970	O
.	O
</s>
<s>
SAS	B-Language
Institute	O
acquired	O
S2K	O
from	O
Intel	O
in	O
1984	O
,	O
which	O
had	O
acquired	O
it	O
from	O
MRI	O
Systems	O
Corporation	O
in	O
1979	O
.	O
</s>
