<s>
The	O
Embedded	B-Operating_System
Configurable	I-Operating_System
Operating	I-Operating_System
System	I-Operating_System
(	O
eCos	B-Operating_System
)	O
is	O
a	O
free	B-License
and	I-License
open-source	I-License
real-time	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
intended	O
for	O
embedded	B-Architecture
systems	I-Architecture
and	O
applications	O
which	O
need	O
only	O
one	O
process	B-Operating_System
with	O
multiple	B-Operating_System
threads	I-Operating_System
.	O
</s>
<s>
It	O
is	O
designed	O
to	O
be	O
customizable	O
to	O
precise	O
application	B-Application
requirements	O
of	O
run-time	O
performance	O
and	O
hardware	O
needs	O
.	O
</s>
<s>
It	O
is	O
implemented	O
in	O
the	O
programming	O
languages	O
C	B-Language
and	O
C++	B-Language
and	O
has	O
compatibility	B-General_Concept
layers	I-General_Concept
and	O
application	B-Application
programming	I-Application
interfaces	I-Application
for	O
Portable	O
Operating	O
System	O
Interface	O
(	O
POSIX	O
)	O
and	O
The	O
Real-time	B-Operating_System
Operating	I-Operating_System
system	I-Operating_System
Nucleus	O
(	O
TRON	O
)	O
variant	O
µITRON	O
.	O
</s>
<s>
eCos	B-Operating_System
is	O
supported	O
by	O
popular	O
SSL/TLS	B-Protocol
libraries	O
such	O
as	O
wolfSSL	B-Protocol
,	O
thus	O
meeting	O
all	O
standards	O
for	O
embedded	O
security	O
.	O
</s>
<s>
eCos	B-Operating_System
was	O
designed	O
for	O
devices	O
with	O
memory	O
sizes	O
in	O
the	O
range	O
of	O
a	O
few	O
tens	O
or	O
several	O
hundred	O
kilobytes	O
,	O
or	O
for	O
applications	O
with	O
real-time	B-Operating_System
requirements	O
.	O
</s>
<s>
eCos	B-Operating_System
runs	O
on	O
a	O
wide	O
variety	O
of	O
hardware	O
platforms	O
,	O
including	O
ARM	B-Architecture
,	O
CalmRISC	O
,	O
FR-V	B-General_Concept
,	O
Hitachi	B-Device
H8	I-Device
,	O
IA-32	B-Device
,	O
Motorola	B-Device
68000	I-Device
,	O
Matsushita	O
AM3x	O
,	O
MIPS	B-Device
,	O
NEC	B-Device
V850	I-Device
,	O
Nios	B-Device
II	I-Device
,	O
PowerPC	B-Architecture
,	O
SPARC	B-Architecture
,	O
and	O
SuperH	O
.	O
</s>
<s>
The	O
eCos	B-Operating_System
distribution	O
includes	O
RedBoot	B-Application
,	O
an	O
open	B-Application
source	I-Application
application	B-Application
that	O
uses	O
the	O
eCos	B-Operating_System
hardware	B-Operating_System
abstraction	I-Operating_System
layer	I-Operating_System
to	O
provide	O
bootstrap	B-Operating_System
firmware	B-Application
for	O
embedded	B-Architecture
systems	I-Architecture
.	O
</s>
<s>
eCos	B-Operating_System
was	O
initially	O
developed	O
in	O
1997	O
by	O
Cygnus	O
Solutions	O
which	O
was	O
later	O
bought	O
by	O
Red	O
Hat	O
.	O
</s>
<s>
In	O
early	O
2002	O
,	O
Red	O
Hat	O
ceased	O
development	O
of	O
eCos	B-Operating_System
and	O
laid	O
off	O
the	O
staff	O
of	O
the	O
project	O
.	O
</s>
<s>
Many	O
of	O
the	O
laid-off	O
staff	O
continued	O
to	O
work	O
on	O
eCos	B-Operating_System
and	O
some	O
formed	O
their	O
own	O
companies	O
providing	O
services	O
for	O
the	O
software	O
.	O
</s>
<s>
In	O
January	O
2004	O
,	O
at	O
the	O
request	O
of	O
the	O
eCos	B-Operating_System
developers	O
,	O
Red	O
Hat	O
agreed	O
to	O
transfer	O
the	O
eCos	B-Operating_System
copyrights	O
to	O
the	B-Operating_System
Free	I-Operating_System
Software	I-Operating_System
Foundation	I-Operating_System
in	O
October	O
2005	O
,	O
a	O
process	B-Operating_System
finally	O
completed	O
in	O
May	O
2008	O
.	O
</s>
<s>
The	O
eCosPro	B-Operating_System
real-time	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
is	O
a	O
commercial	O
fork	B-Application
of	O
eCos	B-Operating_System
created	O
by	O
eCosCentric	O
which	O
incorporates	O
proprietary	B-Application
software	I-Application
components	O
.	O
</s>
<s>
On	O
Pi	O
Day	O
2017	O
,	O
eCosCentric	O
announced	O
they	O
had	O
ported	O
eCosPro	B-Operating_System
to	O
all	O
of	O
the	O
Raspberry	O
Pi	O
models	O
,	O
with	O
demonstrations	O
at	O
the	O
Embedded	O
World	O
trade	O
fair	O
in	O
Nuremberg	O
(	O
Germany	O
)	O
and	O
releases	O
free	O
for	O
non-commercial	O
uses	O
to	O
follow	O
.	O
</s>
