<s>
DATATRIEVE	B-Application
is	O
a	O
database	O
query	O
and	O
report	O
writer	O
tool	O
originally	O
from	O
Digital	O
Equipment	O
Corporation	O
.	O
</s>
<s>
It	O
runs	O
on	O
the	O
OpenVMS	B-Operating_System
operating	O
system	O
,	O
as	O
well	O
as	O
several	O
PDP-11	B-Device
operating	O
systems	O
.	O
</s>
<s>
DATATRIEVE	B-Application
's	O
command	O
structure	O
is	O
nearly	O
plain	O
English	O
,	O
and	O
it	O
is	O
an	O
early	O
example	O
of	O
a	O
Fourth	B-Language
Generation	I-Language
Language	I-Language
(	O
4GL	B-Language
)	O
.	O
</s>
<s>
DATATRIEVE	B-Application
works	O
against	O
flat	O
files	O
,	O
indexed	O
files	O
,	O
and	O
databases	O
.	O
</s>
<s>
DATATRIEVE	B-Application
is	O
used	O
at	O
many	O
OpenVMS	B-Operating_System
installations	O
.	O
</s>
<s>
DATATRIEVE	B-Application
was	O
developed	O
in	O
the	O
late	O
1970s	O
and	O
early	O
1980s	O
by	O
a	O
team	O
of	O
software	O
engineers	O
at	O
DEC	O
's	O
Central	O
Commercial	O
Engineering	O
facilities	O
in	O
Merrimack	O
and	O
Nashua	O
,	O
New	O
Hampshire	O
,	O
under	O
database	O
architect	O
Jim	O
Starkey	O
.	O
</s>
<s>
Version	O
1	O
for	O
the	O
PDP-11	B-Device
was	O
released	O
in	O
1977	O
;	O
VAX	O
DATATRIEVE	B-Application
was	O
released	O
in	O
1981	O
as	O
part	O
of	O
the	O
VAX	O
Information	O
Architecture	O
.	O
</s>
<s>
DATATRIEVE	B-Application
adopted	O
the	O
wombat	B-Operating_System
as	O
its	O
notional	O
mascot	O
;	O
the	O
program	O
's	O
help	O
file	O
responded	O
to	O
“	O
HELP	O
WOMBAT	B-Operating_System
”	O
with	O
factual	O
information	O
about	O
real	O
world	O
wombats	B-Operating_System
.	O
</s>
<s>
DATATRIEVE	B-Application
queries	O
and	O
commands	O
approach	O
plain	O
English	O
sentence	O
structure	O
,	O
though	O
would	O
not	O
be	O
considered	O
natural	O
language	O
,	O
since	O
a	O
precise	O
sentence	O
structure	O
must	O
be	O
used	O
:	O
</s>
<s>
DATATRIEVE	B-Application
can	O
also	O
be	O
used	O
to	O
modify	O
data	O
:	O
</s>
<s>
DATATRIEVE	B-Application
can	O
also	O
cross	O
multiple	O
datasets	O
,	O
creating	O
joined	O
data	O
views	O
:	O
</s>
