<s>
The	O
Multics	B-Application
Relational	I-Application
Data	I-Application
Store	I-Application
,	O
or	O
MRDS	O
for	O
short	O
,	O
was	O
the	O
first	O
commercial	O
relational	B-Application
database	I-Application
management	I-Application
system	I-Application
.	O
</s>
<s>
It	O
was	O
written	O
in	O
PL/1	B-Language
by	O
Honeywell	O
for	O
the	O
Multics	B-Application
operating	I-Application
system	I-Application
and	O
first	O
sold	O
in	O
June	O
1976	O
.	O
</s>
<s>
Unlike	O
the	O
SQL	B-Language
systems	O
that	O
emerged	O
in	O
the	O
late	O
1970s	O
and	O
early	O
80	O
's	O
,	O
MRDS	O
used	O
a	O
command	O
language	O
only	O
for	O
basic	O
data	O
manipulation	O
,	O
equivalent	O
to	O
the	O
SELECT	O
or	O
UPDATE	O
statements	O
in	O
SQL	B-Language
.	O
</s>
