<s>
An	O
embedded	B-Application
database	I-Application
system	O
is	O
a	O
database	B-Application
management	I-Application
system	I-Application
(	O
DBMS	O
)	O
which	O
is	O
tightly	O
integrated	O
with	O
an	O
application	B-Application
software	I-Application
;	O
it	O
is	O
embedded	O
in	O
the	O
application	O
.	O
</s>
<s>
The	O
term	O
embedded	B-Application
database	I-Application
can	O
be	O
confusing	O
because	O
only	O
a	O
small	O
subset	O
of	O
embedded	B-Application
database	I-Application
products	O
are	O
used	O
in	O
real-time	B-General_Concept
embedded	B-Architecture
systems	I-Architecture
such	O
as	O
telecommunications	O
switches	O
and	O
consumer	O
electronics	O
.	O
</s>
<s>
(	O
See	O
mobile	O
database	O
for	O
small-footprint	O
databases	B-Application
that	O
could	O
be	O
used	O
on	O
embedded	B-Architecture
devices	I-Architecture
.	O
)	O
</s>
<s>
Major	O
embedded	B-Application
database	I-Application
products	O
include	O
,	O
in	O
alphabetical	O
order	O
:	O
</s>
<s>
Advantage	B-Application
Database	I-Application
Server	I-Application
from	O
Sybase	O
Inc	O
.	O
</s>
<s>
HSQLDB	B-Application
from	O
HSQLDB.ORG	O
,	O
</s>
<s>
InfinityDB	B-Application
from	O
Boiler	O
Bay	O
Inc	O
.	O
</s>
<s>
Lightning	B-Language
Memory-Mapped	I-Language
Database	I-Language
(	O
LMDB	B-Language
)	O
from	O
Symas	O
Corp	O
.	O
</s>
<s>
Sybase	O
's	O
Advantage	B-Application
Database	I-Application
Server	I-Application
(	O
ADS	O
)	O
is	O
an	O
embedded	B-Application
database	I-Application
management	O
system	O
.	O
</s>
<s>
It	O
provides	O
both	O
ISAM	O
and	O
relational	B-Application
data	O
access	O
and	O
is	O
compatible	O
with	O
multiple	O
platforms	O
including	O
Windows	O
,	O
Linux	B-Application
,	O
and	O
Netware	O
.	O
</s>
<s>
It	O
is	O
available	O
as	O
a	O
royalty-free	O
local	O
file-server	O
database	O
or	O
a	O
full	O
client-server	B-Operating_System
version	O
.	O
</s>
<s>
ADS	O
is	O
highly	O
scalable	O
,	O
with	O
no	O
administration	O
,	O
and	O
has	O
support	O
for	O
a	O
variety	O
of	O
IDEs	O
including	O
.NET	B-Application
Framework	I-Application
(	O
.NET	B-Application
)	O
,	O
Object	B-Language
Pascal	I-Language
(	O
Delphi	B-Language
)	O
,	O
Visual	B-Application
FoxPro	I-Application
(	O
FoxPro	O
)	O
,	O
PHP	B-Application
,	O
Visual	B-Language
Basic	I-Language
(	O
VB	O
)	O
,	O
Visual	B-Language
Objects	I-Language
(	O
VO	O
)	O
,	O
Vulcan	O
,	O
Clipper	B-Application
,	O
Perl	B-Language
,	O
Java	B-Language
,	O
xHarbour	B-Language
,	O
etc	O
.	O
</s>
<s>
Derby	O
is	O
an	O
embeddable	O
SQL	B-Language
engine	O
written	O
entirely	O
in	O
Java	B-Language
.	O
</s>
<s>
Fully	O
transactional	O
,	O
multi-user	O
with	O
a	O
decent	O
SQL	B-Language
subset	O
,	O
Derby	O
is	O
a	O
mature	O
engine	O
and	O
freely	O
available	O
under	O
the	O
Apache	O
license	O
and	O
is	O
actively	O
maintained	O
.	O
</s>
<s>
It	O
is	O
also	O
distributed	O
as	O
part	O
of	O
Oracle	O
's	O
Java	B-Language
SE	O
Development	O
Kit	O
(	O
JDK	O
)	O
under	O
the	O
name	O
of	O
Java	B-Language
DB	O
.	O
</s>
<s>
Empress	O
Embedded	B-Application
Database	I-Application
is	O
a	O
full-function	O
,	O
relational	B-Application
database	I-Application
that	O
has	O
been	O
embedded	O
into	O
applications	O
by	O
organizations	O
small	O
to	O
large	O
,	O
with	O
deployment	O
environments	O
including	O
medical	O
systems	O
,	O
network	O
routers	O
,	O
nuclear	O
power	O
plant	O
monitors	O
,	O
satellite	O
management	O
systems	O
,	O
and	O
other	O
embedded	B-Architecture
system	I-Architecture
applications	O
that	O
require	O
reliability	O
and	O
power	O
.	O
</s>
<s>
Empress	O
is	O
an	O
ACID	O
compliant	O
,	O
SQL	B-Language
database	I-Language
engine	O
with	O
C	O
,	O
C++	B-Language
,	O
Java	B-Language
,	O
JDBC	B-Language
,	O
ODBC	O
,	O
SQL	B-Language
,	O
ADO.NET	B-Device
and	O
kernel	B-Operating_System
level	O
APIs	B-General_Concept
.	O
</s>
<s>
Applications	O
developed	O
using	O
these	O
APIs	B-General_Concept
may	O
be	O
run	O
in	O
standalone	O
and/or	O
server	O
modes	O
.	O
</s>
<s>
Empress	O
Embedded	B-Application
Database	I-Application
runs	O
on	O
Linux	B-Application
,	O
Unix	B-Application
,	O
Microsoft	O
Windows	O
and	O
real-time	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
.	O
</s>
<s>
McObject	O
LLC	O
launched	O
eXtremeDB	B-Application
as	O
the	O
first	O
in-memory	B-General_Concept
embedded	B-Application
database	I-Application
designed	O
from	O
scratch	O
for	O
real-time	B-General_Concept
embedded	B-Architecture
systems	I-Architecture
.	O
</s>
<s>
The	O
initial	O
product	O
was	O
soon	O
joined	O
by	O
eXtremeDB	B-Application
High	O
Availability	O
(	O
HA	O
)	O
for	O
fault	B-General_Concept
tolerant	I-General_Concept
applications	O
.	O
</s>
<s>
The	O
product	O
family	O
now	O
includes	O
64-bit	O
and	O
transaction	B-General_Concept
logging	I-General_Concept
editions	O
,	O
and	O
the	O
hybrid	O
eXtremeDB	B-Application
Fusion	O
,	O
which	O
combines	O
in-memory	B-General_Concept
and	O
on-disk	O
data	O
storage	O
.	O
</s>
<s>
In	O
2008	O
,	O
McObject	O
introduced	O
eXtremeDB	B-Application
Kernel	B-Operating_System
Mode	O
,	O
the	O
first	O
embedded	O
DBMS	O
designed	O
to	O
run	O
in	O
an	O
operating	B-Operating_System
system	I-Operating_System
kernel	I-Operating_System
.	O
</s>
<s>
Today	O
,	O
eXtremeDB	B-Application
is	O
used	O
in	O
millions	O
of	O
real-time	B-General_Concept
and	O
embedded	B-Architecture
systems	I-Architecture
worldwide	O
.	O
</s>
<s>
McObject	O
also	O
offers	O
Perst	B-Application
,	O
an	O
open	B-Application
source	I-Application
,	O
object-oriented	B-Application
embedded	B-Application
database	I-Application
for	O
Java	B-Language
,	O
Java	B-Language
ME	I-Language
,	O
.NET	B-Application
,	O
.NET	B-Operating_System
Compact	I-Operating_System
Framework	I-Operating_System
and	O
Silverlight	B-Application
.	O
</s>
<s>
Firebird	B-Application
Embedded	O
is	O
a	O
relational	B-Application
database	I-Application
engine	O
.	O
</s>
<s>
As	O
an	O
open	B-Application
source	I-Application
fork	O
of	O
InterBase	B-Application
,	O
it	O
is	O
ACID	O
compliant	O
,	O
supports	O
triggers	O
and	O
stored	O
procedures	O
,	O
and	O
is	O
available	O
on	O
Linux	B-Application
,	O
OSX	B-Operating_System
and	O
Windows	O
systems	O
.	O
</s>
<s>
It	O
has	O
the	O
same	O
features	O
as	O
the	O
classic	O
and	O
superserver	O
version	O
of	O
Firebird	B-Application
,	O
two	O
or	O
more	O
threads	O
(	O
and	O
applications	O
)	O
can	O
access	O
the	O
same	O
database	O
at	O
the	O
same	O
time	O
starting	O
with	O
Firebird	B-Application
2.5	O
.	O
</s>
<s>
So	O
Firebird	B-Application
embedded	O
acts	O
as	O
a	O
local	O
server	O
for	O
one	O
threaded	O
client	O
accessing	O
its	O
databases	B-Application
(	O
that	O
means	O
it	O
works	O
properly	O
for	O
ASP.NET	O
web	O
applications	O
,	O
because	O
there	O
,	O
each	O
user	O
has	O
its	O
own	O
thread	O
,	O
which	O
means	O
two	O
users	O
could	O
access	O
the	O
same	O
database	O
at	O
the	O
same	O
time	O
,	O
but	O
they	O
would	O
not	O
be	O
in	O
the	O
same	O
thread	O
,	O
because	O
ASP.NET	O
opens	O
a	O
new	O
thread	O
for	O
each	O
user	O
)	O
.	O
</s>
<s>
It	O
exports	O
the	O
standard	O
Firebird	B-Application
API	B-General_Concept
entry	O
points	O
.	O
</s>
<s>
Written	O
in	O
Java	B-Language
Open	B-Application
source	I-Application
database	O
engine	O
.	O
</s>
<s>
Embedded	O
and	O
Server	O
mode	O
,	O
Clustering	O
support	O
,	O
can	O
run	O
inside	O
the	B-Application
Google	I-Application
App	B-Application
Engine	I-Application
.	O
</s>
<s>
H2	O
is	O
dual	O
licensed	O
and	O
available	O
under	O
a	O
modified	O
version	O
of	O
the	O
MPL	B-License
1.1	I-License
(	O
Mozilla	B-License
Public	I-License
License	I-License
)	O
or	O
under	O
the	O
(	O
unmodified	O
)	O
EPL	O
1.0	O
(	O
Eclipse	O
Public	O
License	O
)	O
.	O
</s>
<s>
HailDB	O
is	O
a	O
standalone	O
,	O
embeddable	O
form	O
of	O
the	O
InnoDB	B-Language
Storage	O
Engine	O
.	O
</s>
<s>
Given	O
that	O
HailDB	O
is	O
based	O
on	O
the	O
same	O
code	O
base	O
as	O
the	O
InnoDB	B-Language
Storage	O
Engine	O
,	O
it	O
contains	O
many	O
of	O
the	O
same	O
features	O
:	O
high-performance	O
and	O
scalability	O
,	O
multiversion	B-Operating_System
concurrency	I-Operating_System
control	I-Operating_System
(	O
MVCC	O
)	O
,	O
row-level	O
locking	O
,	O
deadlock	O
detection	O
,	O
fault	B-General_Concept
tolerance	I-General_Concept
,	O
automatic	O
crash	O
recovery	O
,	O
etc	O
.	O
</s>
<s>
By	O
eliminating	O
the	O
MySQL	O
server	O
overhead	O
,	O
InnoDB	B-Language
has	O
a	O
small	O
footprint	O
and	O
is	O
well-suited	O
for	O
embedding	O
in	O
applications	O
which	O
require	O
high-performance	O
and	O
concurrency	O
.	O
</s>
<s>
As	O
with	O
most	O
embedded	B-Application
database	I-Application
systems	O
,	O
HailDB	O
is	O
designed	O
to	O
be	O
accessed	O
primarily	O
with	O
an	O
ISAM-like	O
C	O
API	B-General_Concept
rather	O
than	O
SQL	B-Language
(	O
though	O
an	O
extremely	O
rudimentary	O
SQL	B-Language
variant	O
is	O
supported	O
)	O
.	O
</s>
<s>
HSQLDB	B-Application
is	O
an	O
opensource	O
relational	B-Application
database	I-Application
management	I-Application
system	I-Application
with	O
a	O
BSD-like	O
license	O
that	O
runs	O
in	O
the	O
same	O
Java	B-Language
Virtual	O
Machine	O
as	O
the	O
embedded	O
application	O
.	O
</s>
<s>
HSQLDB	B-Application
supports	O
a	O
variety	O
of	O
in-memory	B-General_Concept
and	O
disk-based	O
table	O
modes	O
,	O
Unicode	O
and	O
SQL:2016	O
.	O
</s>
<s>
InfinityDB	B-Application
Embedded	O
Java	B-Language
DBMS	O
is	O
a	O
sorted	O
hierarchical	O
key/value	B-Data_Structure
store	I-Data_Structure
.	O
</s>
<s>
It	O
now	O
has	O
an	O
Encrypted	O
edition	O
and	O
a	O
Client/Server	B-Operating_System
edition	O
.	O
</s>
<s>
InfinityDB	B-Application
is	O
secure	O
,	O
transactional	O
,	O
compressing	O
,	O
and	O
robust	O
,	O
in	O
a	O
single	O
file	O
for	O
instant	O
installation	O
and	O
zero	O
administration	O
.	O
</s>
<s>
APIs	B-General_Concept
include	O
the	O
simple	O
fast	O
'	O
ItemSpace	O
 '	O
,	O
a	O
ConcurrentNavigableMap	O
view	O
,	O
and	O
JSON	O
.	O
</s>
<s>
A	O
RemoteItemSpace	O
can	O
transparently	O
redirect	O
the	O
embedded	O
APIs	B-General_Concept
to	O
other	O
db	O
instances	O
.	O
</s>
<s>
Client/Server	B-Operating_System
includes	O
a	O
light-weight	O
Servlet	O
server	O
,	O
web	O
admin	O
and	O
database	O
browsing	O
,	O
and	O
REST	O
for	O
python	O
.	O
</s>
<s>
Informix	B-Application
Dynamic	I-Application
Server	I-Application
(	O
IDS	O
)	O
is	O
characterized	O
as	O
an	O
enterprise	O
class	O
embeddable	O
database	O
server	O
,	O
combining	O
embeddable	O
features	O
such	O
as	O
low	O
footprint	O
,	O
programmable	O
and	O
autonomic	O
capabilities	O
with	O
enterprise	O
class	O
database	O
features	O
such	O
as	O
high	O
availability	O
and	O
flexible	O
replication	O
features	O
.	O
</s>
<s>
InterBase	B-Application
is	O
an	O
IoT	O
Award-winning	O
cross-platform	O
,	O
Unicode	O
enabled	O
SQL	B-Language
database	I-Language
platform	O
able	O
to	O
be	O
embedded	O
within	O
turn-key	O
applications	O
.	O
</s>
<s>
Out	O
of	O
the	O
box	O
SMP	O
support	O
and	O
on	O
disk	O
AES	O
strength	O
256bit	O
encryption	O
,	O
SQL	B-Language
92	O
&	O
ACID	O
compliance	O
and	O
support	O
for	O
Windows	O
,	O
Macintosh	O
,	O
Linux	B-Application
,	O
Solaris	O
,	O
iOS	B-Application
and	O
Android	B-Application
platforms	I-Application
.	O
</s>
<s>
InterBase	B-Application
Light	O
is	O
a	O
free	O
version	O
that	O
can	O
be	O
used	O
on	O
any	O
mobile	O
device	O
and	O
is	O
ideal	O
for	O
mobile	O
applications	O
.	O
</s>
<s>
InterBase	B-Application
has	O
high	O
adoption	O
in	O
defense	O
,	O
airspace	O
,	O
oil	O
and	O
gas	O
,	O
and	O
manufacturing	O
industries	O
.	O
</s>
<s>
LevelDB	B-Language
is	O
an	O
ordered	O
key/value	B-Data_Structure
store	I-Data_Structure
created	O
by	O
Google	B-Application
as	O
a	O
lightweight	O
implementation	O
of	O
the	O
Bigtable	B-Application
storage	O
design	O
.	O
</s>
<s>
As	O
a	O
library	O
(	O
which	O
is	O
the	O
only	O
way	O
to	O
use	O
LevelDB	B-Language
)	O
,	O
its	O
native	O
API	B-General_Concept
is	O
C++	B-Language
.	O
</s>
<s>
Third-party	O
API	B-General_Concept
wrappers	O
exist	O
for	O
,	O
,	O
(	O
exists	O
but	O
is	O
in	O
progress	O
still	O
)	O
,	O
and	O
Objective	O
C	O
.	O
Google	B-Application
distributes	O
LevelDB	B-Language
under	O
the	O
New	O
BSD	O
License	O
.	O
</s>
<s>
Lightning	B-Language
Memory-Mapped	I-Language
Database	I-Language
(	O
LMDB	B-Language
)	O
is	O
a	O
memory-mapped	O
key-value	B-Data_Structure
database	I-Data_Structure
for	O
the	O
OpenLDAP	B-Language
Project	O
.	O
</s>
<s>
It	O
is	O
written	O
in	O
C	O
and	O
the	O
API	B-General_Concept
is	O
modeled	O
after	O
the	O
Berkeley	B-Language
DB	I-Language
API	B-General_Concept
,	O
though	O
much	O
simplified	O
.	O
</s>
<s>
The	O
library	O
is	O
extremely	O
compact	O
,	O
compiling	O
down	O
to	O
under	O
40KB	O
of	O
x86	O
object	O
code	O
,	O
being	O
usually	O
faster	O
than	O
similar	O
libraries	O
like	O
Berkeley	B-Language
DB	I-Language
,	O
LevelDB	B-Language
,	O
etc	O
.	O
</s>
<s>
The	O
library	O
implements	O
B+trees	O
with	O
multiversion	B-Operating_System
concurrency	I-Operating_System
control	I-Operating_System
(	O
MVCC	O
)	O
,	O
single-level	B-Device
store	I-Device
,	O
Copy	B-Language
on	I-Language
write	I-Language
and	O
provides	O
full	O
ACID	O
transactions	B-General_Concept
with	O
no	O
deadlocks	O
.	O
</s>
<s>
LMDB	B-Language
is	O
distributed	O
by	O
the	O
OpenLDAP	B-Language
Project	O
under	O
the	O
OpenLDAP	B-Language
Public	O
License	O
.	O
</s>
<s>
As	O
of	O
2013	O
the	O
OpenLDAP	B-Language
Project	O
is	O
deprecating	O
the	O
use	O
of	O
Berkeley	B-Language
DB	I-Language
,	O
in	O
favor	O
of	O
LMDB	B-Language
.	O
</s>
<s>
An	O
embedded	O
zero	O
maintenance	O
version	O
of	O
the	O
proprietary	O
Mimer	O
SQL	B-Language
relational	B-Application
database	I-Application
server	O
is	O
available	O
.	O
</s>
<s>
It	O
has	O
a	O
small	O
footprint	O
due	O
to	O
its	O
modular	O
design	O
,	O
full	O
support	O
for	O
the	O
SQL	B-Language
standard	O
,	O
and	O
with	O
ports	O
to	O
Windows	O
,	O
Linux	B-Application
,	O
Automotive	B-Application
Grade	I-Application
Linux	I-Application
,	O
Android	B-Application
,	O
QNX	B-Operating_System
,	O
INTEGRITY	O
,	O
among	O
others	O
.	O
</s>
<s>
is	O
the	O
embedded	O
version	O
of	O
the	O
open	B-Application
source	I-Application
MonetDB	O
SQL	B-Language
column	O
store	O
engine	O
.	O
</s>
<s>
Available	O
for	O
C	O
,	O
C++	B-Language
,	O
Java	B-Language
(	O
JDBC	B-Language
)	O
and	O
Python	O
.	O
</s>
<s>
MonetDB	O
License	O
,	O
based	O
on	O
MPL	B-License
2.0	I-License
.	O
</s>
<s>
The	O
predecessor	O
MonetDBLite	O
(	O
for	O
R	O
,	O
Python	O
and	O
Java	B-Language
)	O
is	O
no	O
longer	O
maintained	O
.	O
</s>
<s>
After	O
initialization	O
,	O
clients	O
can	O
use	O
the	O
same	O
C	O
API	B-General_Concept
calls	O
as	O
when	O
talking	O
to	O
a	O
separate	O
MySQL	O
server	O
but	O
with	O
less	O
communication	O
overhead	O
and	O
with	O
no	O
need	O
for	O
a	O
separate	O
database	O
process	O
.	O
</s>
<s>
NexusDB	O
is	O
the	O
commercial	O
successor	O
to	O
the	O
database	O
which	O
is	O
now	O
open	B-Application
source	I-Application
.	O
</s>
<s>
They	O
can	O
both	O
be	O
embedded	O
in	O
Delphi	B-Language
applications	O
to	O
create	O
stand-alone	O
executables	O
with	O
full	O
database	O
functionality	O
.	O
</s>
<s>
As	O
the	O
name	O
implies	O
,	O
Oracle	O
's	O
embedded	B-Application
database	I-Application
is	O
actually	O
Berkeley	B-Language
DB	I-Language
,	O
which	O
Oracle	O
acquired	O
from	O
Sleepycat	O
Software	O
.	O
</s>
<s>
Berkeley	B-Language
DB	I-Language
is	O
a	O
fast	O
,	O
open-source	B-Application
embedded	B-Application
database	I-Application
and	O
is	O
used	O
in	O
several	O
well-known	O
open-source	B-Application
products	O
,	O
including	O
the	O
Linux	B-Application
and	O
BSD	O
Unix	B-Application
operating	I-Application
systems	I-Application
,	O
Apache	O
Web	O
server	O
,	O
OpenOffice	O
productivity	O
suite	O
.	O
</s>
<s>
Nonetheless	O
,	O
over	O
recent	O
years	O
many	O
well-known	O
projects	O
switched	O
to	O
using	O
LMDB	B-Language
,	O
because	O
it	O
outperform	O
Berkeley	B-Language
DB	I-Language
in	O
key	O
scenarios	O
on	O
the	O
ground	O
of	O
"	O
less	B-Device
is	I-Device
more	I-Device
"	O
design	O
,	O
as	O
well	O
due	O
to	O
the	O
license	O
changing	O
.	O
</s>
<s>
Raima	B-Application
Database	I-Application
Manager	I-Application
,	O
produced	O
by	O
Raima	O
.	O
</s>
<s>
According	O
to	O
Raima	O
's	O
definition	O
,	O
the	O
product	O
is	O
embedded	O
in	O
two	O
senses	O
:	O
first	O
,	O
it	O
is	O
embedded	O
within	O
an	O
application	O
,	O
becoming	O
an	O
extension	O
to	O
the	O
application	O
,	O
and	O
second	O
,	O
it	O
is	O
possible	O
to	O
use	O
it	O
in	O
embedded	O
computer/OS	O
or	O
real-time	B-General_Concept
environments	O
because	O
of	O
its	O
small	O
footprint	O
and	O
efficient	O
operation	O
.	O
</s>
<s>
Its	O
APIs	B-General_Concept
(	O
for	O
C/C	O
++	O
,	O
SQL	B-Language
,	O
JDBC	B-Language
,	O
ODBC	O
,	O
ADO.NET	B-Device
,	O
and	O
RESTful	O
)	O
have	O
been	O
designed	O
to	O
support	O
the	O
limited	O
resources	O
of	O
embedded	O
environments	O
.	O
</s>
<s>
RocksDB	O
,	O
created	O
at	O
Facebook	B-Application
,	O
began	O
as	O
a	O
fork	O
of	O
LevelDB	B-Language
.	O
</s>
<s>
It	O
focuses	O
on	O
performance	O
,	O
especially	O
on	O
SSDs	B-Device
.	O
</s>
<s>
It	O
adds	O
many	O
features	O
,	O
including	O
transactions	B-General_Concept
,	O
backups	B-Protocol
,	O
snapshots	B-Application
,	O
bloom	B-Algorithm
filters	I-Algorithm
,	O
column	B-Application
families	I-Application
,	O
expiry	O
,	O
custom	O
merge	O
operators	O
,	O
more	O
tunable	O
compaction	O
,	O
statistics	O
collection	O
,	O
and	O
geospatial	O
indexing	O
.	O
</s>
<s>
It	O
is	O
used	O
as	O
a	O
storage	O
engine	O
inside	O
of	O
several	O
other	O
databases	B-Application
,	O
including	O
ArangoDB	B-Operating_System
,	O
Ceph	B-Operating_System
,	O
CockroachDB	B-Operating_System
,	O
MongoRocks	O
,	O
MyRocks	B-Language
,	O
Rocksandra	O
,	O
TiKV	O
.	O
</s>
<s>
and	O
YugabyteDB	B-Operating_System
.	O
</s>
<s>
solid	O
DB	O
is	O
a	O
hybrid	O
on-disk/in	O
-memory	O
,	O
relational	B-Application
database	I-Application
and	O
is	O
often	O
used	O
as	O
an	O
embedded	B-Architecture
system	I-Architecture
database	O
in	O
telecommunications	O
equipment	O
,	O
network	O
software	O
,	O
and	O
similar	O
systems	O
.	O
</s>
<s>
In-memory	B-General_Concept
database	I-General_Concept
technology	O
is	O
used	O
to	O
achieve	O
throughput	O
of	O
tens	O
of	O
thousands	O
of	O
transactions	B-General_Concept
per	O
second	O
with	O
response	O
times	O
measured	O
in	O
microseconds	O
.	O
</s>
<s>
SQLite	B-Language
is	O
a	O
software	O
library	O
that	O
implements	O
a	O
self-contained	O
,	O
server-less	O
,	O
zero-configuration	O
,	O
transactional	O
SQL	B-Language
database	I-Language
engine	O
.	O
</s>
<s>
SQLite	B-Language
is	O
the	O
most	O
widely	O
deployed	O
SQL	B-Language
database	I-Language
engine	O
in	O
the	O
world	O
.	O
</s>
<s>
The	O
source	O
code	O
,	O
chiefly	O
C	O
,	O
for	O
SQLite	B-Language
is	O
in	O
the	O
public	O
domain	O
.	O
</s>
<s>
It	O
's	O
included	O
in	O
several	O
operating	O
systems	O
;	O
among	O
them	O
are	O
Android	B-Application
,	O
FreeBSD	B-Operating_System
,	O
iOS	B-Application
,	O
OS	B-Operating_System
X	I-Operating_System
and	O
Windows	B-Operating_System
10	I-Operating_System
.	O
</s>
<s>
SQL	B-Operating_System
Server	I-Operating_System
Compact	I-Operating_System
is	O
an	O
embedded	B-Application
database	I-Application
by	O
Microsoft	O
with	O
wide	O
variety	O
of	O
features	O
like	O
multi-process	O
connections	O
,	O
T-SQL	O
,	O
ADO.NET	B-Device
Sync	O
Services	O
to	O
sync	O
with	O
any	O
back	O
end	O
database	O
,	O
Merge	O
Replication	O
with	O
SQL	B-Language
Server	O
,	O
Programming	O
API	B-General_Concept
:	O
LINQ	O
to	O
SQL	B-Language
,	O
LINQ	O
to	O
Entities	O
,	O
ADO.NET	B-Device
.	O
</s>
<s>
The	O
product	O
went	O
through	O
multiple	O
re-brandings	O
and	O
was	O
known	O
with	O
multiple	O
names	O
like	O
:	O
SQL	B-Operating_System
CE	I-Operating_System
,	O
SQL	B-Operating_System
Server	I-Operating_System
CE	I-Operating_System
,	O
SQL	B-Operating_System
Server	I-Operating_System
Mobile	I-Operating_System
,	O
SQL	B-Operating_System
Mobile	I-Operating_System
.	O
</s>
