<s>
A	O
database	B-Application
application	I-Application
is	O
a	O
computer	O
program	O
whose	O
primary	O
purpose	O
is	O
retrieving	O
information	O
from	O
a	O
computerized	O
database	O
.	O
</s>
<s>
Early	O
examples	O
of	O
database	B-Application
applications	I-Application
were	O
accounting	O
systems	O
and	O
airline	O
reservations	O
systems	O
,	O
such	O
as	O
SABRE	B-Application
,	O
developed	O
starting	O
in	O
1957	O
.	O
</s>
<s>
A	O
characteristic	O
of	O
modern	O
database	B-Application
applications	I-Application
is	O
that	O
they	O
facilitate	O
simultaneous	O
updates	O
and	O
queries	O
from	O
multiple	O
users	O
.	O
</s>
<s>
Systems	O
in	O
the	O
1970s	O
might	O
have	O
accomplished	O
this	O
by	O
having	O
each	O
user	O
in	O
front	O
of	O
a	O
3270	B-Operating_System
terminal	I-Operating_System
to	O
a	O
mainframe	B-Architecture
computer	I-Architecture
.	O
</s>
<s>
By	O
the	O
mid-1980s	O
it	O
was	O
becoming	O
more	O
common	O
to	O
give	O
each	O
user	O
a	O
personal	B-Device
computer	I-Device
and	O
have	O
a	O
program	O
running	O
on	O
that	O
PC	O
that	O
is	O
connected	O
to	O
a	O
database	O
server	B-Application
.	O
</s>
<s>
Starting	O
in	O
the	O
mid-1990s	O
it	O
became	O
more	O
common	O
to	O
build	O
database	B-Application
applications	I-Application
with	O
a	O
Web	O
interface	O
.	O
</s>
<s>
A	O
database	B-Application
application	I-Application
with	O
a	O
Web	O
interface	O
had	O
the	O
advantage	O
that	O
it	O
could	O
be	O
used	O
on	O
devices	O
of	O
different	O
sizes	O
,	O
with	O
different	O
hardware	O
,	O
and	O
with	O
different	O
operating	O
systems	O
.	O
</s>
<s>
Examples	O
of	O
early	O
database	B-Application
applications	I-Application
with	O
Web	O
interfaces	O
include	O
amazon.com,	O
which	O
used	O
the	O
Oracle	B-General_Concept
relational	I-General_Concept
database	I-General_Concept
management	I-General_Concept
system	I-General_Concept
,	O
the	O
photo.net	O
online	O
community	O
,	O
whose	O
implementation	O
on	O
top	O
of	O
Oracle	B-Application
was	O
described	O
in	O
the	O
book	O
Database-Backed	O
Web	O
Sites	O
(	O
Ziff-Davis	O
Press	O
;	O
May	O
1997	O
)	O
,	O
and	O
eBay	B-Application
,	O
also	O
running	O
Oracle	B-Application
.	O
</s>
<s>
Electronic	B-Application
medical	I-Application
records	I-Application
are	O
referred	O
to	O
on	O
emrexperts.com,	O
in	O
December	O
2010	O
,	O
as	O
"	O
a	O
software	O
database	B-Application
application	I-Application
"	O
.	O
</s>
<s>
A	O
2005	O
O'Reilly	O
book	O
uses	O
the	O
term	O
in	O
its	O
title	O
:	O
Database	B-Application
Applications	I-Application
and	O
the	O
Web	O
.	O
</s>
<s>
Some	O
of	O
the	O
most	O
complex	O
database	B-Application
applications	I-Application
remain	O
accounting	O
systems	O
,	O
such	O
as	O
SAP	B-Application
,	O
which	O
may	O
contain	O
thousands	O
of	O
tables	O
in	O
only	O
a	O
single	O
module	O
.	O
</s>
<s>
Many	O
of	O
today	O
's	O
most	O
widely	O
used	O
computer	O
systems	O
are	O
database	B-Application
applications	I-Application
,	O
for	O
example	O
,	O
Facebook	B-Application
,	O
which	O
was	O
built	O
on	O
top	O
of	O
MySQL	B-Application
.	O
</s>
<s>
The	O
etymology	O
of	O
the	O
phrase	O
"	O
database	B-Application
application	I-Application
"	O
comes	O
from	O
the	O
practice	O
of	O
dividing	O
computer	O
software	O
into	O
systems	O
programs	O
,	O
such	O
as	O
the	O
operating	O
system	O
,	O
compilers	O
,	O
the	O
file	O
system	O
,	O
and	O
tools	O
such	O
as	O
the	O
database	O
management	O
system	O
,	O
and	O
application	O
programs	O
,	O
such	O
as	O
a	O
payroll	O
check	O
processor	O
.	O
</s>
<s>
As	O
"	O
application	O
"	O
is	O
short	O
for	O
"	O
application	O
program	O
"	O
,	O
"	O
database	B-Application
application	I-Application
"	O
is	O
short	O
for	O
"	O
database	B-Application
application	I-Application
program	O
"	O
.	O
</s>
<s>
Not	O
every	O
program	O
that	O
uses	O
a	O
database	O
would	O
typically	O
be	O
considered	O
a	O
"	O
database	B-Application
application	I-Application
"	O
.	O
</s>
<s>
The	O
computer	O
programs	O
that	O
analyze	O
the	O
data	O
are	O
primarily	O
developed	O
to	O
answer	O
hypotheses	O
,	O
not	O
to	O
put	O
information	O
back	O
into	O
the	O
database	O
and	O
therefore	O
the	O
overall	O
program	O
would	O
not	O
be	O
called	O
a	O
"	O
database	B-Application
application	I-Application
"	O
.	O
</s>
