<s>
Enea	B-Operating_System
AB	I-Operating_System
is	O
a	O
global	O
information	O
technology	O
company	O
with	O
its	O
headquarters	O
in	O
Kista	O
,	O
Sweden	O
that	O
provides	O
real-time	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
and	O
consulting	O
services	O
.	O
</s>
<s>
During	O
the	O
1970s	O
the	O
firm	O
developed	O
compiler	O
technology	O
for	O
the	O
Simula	B-Language
programming	I-Language
language	I-Language
.	O
</s>
<s>
During	O
the	O
early	O
days	O
of	O
the	O
European	O
Internet-like	O
connections	O
,	O
Enea	O
employee	O
Björn	O
Eriksen	O
connected	O
Sweden	O
to	O
EUnet	O
using	O
UUCP	B-Protocol
,	O
and	O
registered	O
enea	O
as	O
the	O
first	O
Swedish	O
domain	O
in	O
April	O
1983	O
.	O
</s>
<s>
The	O
domain	O
was	O
later	O
converted	O
to	O
the	O
internet	O
domain	O
enea.se	O
when	O
the	O
network	O
was	O
switched	O
over	O
to	O
TCP	B-Protocol
and	O
the	O
Swedish	O
top	O
domain	O
.se	O
was	O
created	O
in	O
1986	O
.	O
</s>
<s>
The	O
ENEA	O
OSE	O
real-time	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
first	O
released	O
in	O
1985	O
.	O
</s>
<s>
The	O
Enea	O
multi	B-Architecture
core	I-Architecture
family	O
of	O
real-time	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
was	O
first	O
released	O
in	O
2009	O
.	O
</s>
<s>
The	O
Enea	O
Operating	O
System	O
Embedded	O
(	O
OSE	O
)	O
is	O
a	O
family	O
of	O
real-time	O
,	O
microkernel	B-Operating_System
,	O
embedded	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
created	O
by	O
Bengt	O
Eliasson	O
for	O
ENEA	B-Operating_System
AB	I-Operating_System
,	O
which	O
at	O
the	O
time	O
was	O
collaborating	O
with	O
Ericsson	O
to	O
develop	O
a	O
multi-core	B-Architecture
system	O
using	O
Assembly	B-Language
,	O
C	B-Language
,	O
and	O
C++	B-Language
.	O
</s>
<s>
Enea	O
OSE	O
Multicore	B-Architecture
Edition	O
is	O
based	O
on	O
the	O
same	O
microkernel	B-Operating_System
architecture	O
.	O
</s>
<s>
The	O
kernel	O
design	O
that	O
combines	O
the	O
advantages	O
of	O
both	O
traditional	O
asymmetric	B-Operating_System
multiprocessing	I-Operating_System
(	O
AMP	O
)	O
and	O
symmetric	B-Operating_System
multiprocessing	I-Operating_System
(	O
SMP	O
)	O
.	O
</s>
<s>
Enea	O
OSE	O
Multicore	B-Architecture
Edition	O
offers	O
both	O
AMP	O
and	O
SMP	O
processing	O
in	O
a	O
hybrid	O
architecture	O
.	O
</s>
<s>
These	O
include	O
the	O
ColdFire	B-Device
,	O
ARM	B-Architecture
,	O
PowerPC	B-Architecture
,	O
and	O
MIPS	B-Device
based	O
system	B-Architecture
on	I-Architecture
a	I-Architecture
chip	I-Architecture
(	O
SoC	O
)	O
devices	O
.	O
</s>
<s>
The	O
Enea	O
OSE	O
family	O
features	O
three	O
OSs	O
:	O
OSE	O
(	O
also	O
named	O
OSE	O
Delta	O
)	O
for	O
processors	O
by	O
ARM	B-Architecture
,	O
PowerPC	B-Architecture
,	O
and	O
MIPS	B-Device
,	O
OSEck	O
for	O
various	O
DSP	O
's	O
,	O
and	O
OSE	O
Epsilon	O
for	O
minimal	O
devices	O
,	O
written	O
in	O
pure	O
assembly	B-Language
(	O
ARM	B-Architecture
,	O
ColdFire	B-Device
,	O
C166	B-Device
,	O
M16C	O
,	O
8051	B-Architecture
)	O
.	O
</s>
<s>
OSE	O
is	O
a	O
closed-source	B-Application
proprietarily	B-Application
licensed	I-Application
software	I-Application
released	O
on	O
20	O
March	O
2018	O
.	O
</s>
<s>
OSE	O
uses	O
events	O
(	O
or	O
signals	B-Application
)	O
in	O
the	O
form	O
of	O
messages	O
passed	O
to	O
and	O
from	O
processes	B-Operating_System
in	O
the	O
system	O
.	O
</s>
<s>
Messages	O
are	O
stored	O
in	O
a	O
queue	B-Application
attached	O
to	O
each	O
process	O
.	O
</s>
<s>
A	O
link	O
handler	O
mechanism	O
allows	O
signals	B-Application
to	O
be	O
passed	O
between	O
processes	B-Operating_System
on	O
separate	O
machines	O
,	O
over	O
a	O
variety	O
of	O
transports	O
.	O
</s>
<s>
The	O
OSE	O
signalling	O
mechanism	O
formed	O
the	O
basis	O
of	O
an	O
open-source	B-License
inter-process	O
kernel	O
design	O
project	O
named	O
LINX	O
.	O
</s>
<s>
Enea	O
Linux	B-Application
provides	O
an	O
open	O
,	O
cross-development	O
tool	O
chain	O
and	O
runtime	O
environment	O
based	O
on	O
the	O
Yocto	B-Application
Project	I-Application
embedded	O
Linux	B-Application
configuration	O
system	O
.	O
</s>
<s>
Enea	O
is	O
a	O
member	O
of	O
various	O
collaborative	O
projects	O
and	O
open	B-License
source	I-License
communities	O
:	O
</s>
