<s>
Power	B-Device
Architecture	I-Device
Platform	I-Device
Reference	I-Device
(	O
PAPR	O
)	O
is	O
an	O
initiative	O
from	O
Power.org	O
to	O
make	O
a	O
new	O
open	O
computing	O
platform	O
based	O
on	O
Power	B-Architecture
ISA	I-Architecture
processors	O
.	O
</s>
<s>
It	O
follows	O
two	O
previous	O
attempts	O
made	O
in	O
the	O
1990s	O
,	O
PReP	B-Device
and	O
CHRP	B-Device
.	O
</s>
<s>
Various	O
operating	O
systems	O
like	O
Linux	B-Application
and	O
IBM	B-Application
AIX	I-Application
rely	O
on	O
the	O
PAPR	O
interface	O
to	O
run	O
on	O
Power-based	O
hardware	O
.	O
</s>
<s>
PAPR	O
is	O
org	O
's	O
move	O
toward	O
what	O
IBM	O
did	O
originally	O
with	O
PReP	B-Device
,	O
in	O
that	O
it	O
defines	O
a	O
common	O
hardware	O
definition	O
and	O
software/firmware	O
platform	O
under	O
a	O
set	O
of	O
requirements	O
.	O
</s>
<s>
In	O
practice	O
,	O
the	O
PAPR	O
is	O
an	O
extension	O
to	O
the	O
Open	B-Architecture
Firmware	I-Architecture
specification	O
.	O
</s>
<s>
Since	O
2013	O
,	O
extensions	O
have	O
been	O
done	O
by	O
the	O
OpenPOWER	B-Application
Foundation	I-Application
,	O
which	O
released	O
a	O
slightly	O
reduced	O
public	O
version	O
of	O
the	O
PAPR	O
standard	O
for	O
running	O
Linux	B-Application
on	O
Power	O
hardware	O
(	O
called	O
LoPAPR	O
)	O
.	O
</s>
<s>
In	O
2020	O
,	O
LoPAPR	O
was	O
renamed	O
to	O
Linux	B-Application
on	O
Power	B-Architecture
Architecture	I-Architecture
Reference	O
(	O
LoPAR	O
)	O
with	O
the	O
release	O
of	O
a	O
new	O
version	O
.	O
</s>
<s>
In	O
July	O
2020	O
,	O
the	O
document	O
sources	O
of	O
LoPAR	O
were	O
released	O
on	O
terms	O
of	O
Apache	O
License	O
2.0	O
in	O
OpenPOWER	B-Application
Foundation	I-Application
GitHub	O
account	O
,	O
and	O
are	O
accepting	O
pull	O
requests	O
from	O
the	O
community	O
.	O
</s>
<s>
IBM	O
JS20/21	O
—	O
PowerPC	B-General_Concept
970FX/MP	I-General_Concept
based	O
server	B-Architecture
blades	I-Architecture
.	O
</s>
<s>
The	O
IBM	B-Device
System	I-Device
p	I-Device
product	O
line	O
,	O
called	O
IBM	B-Device
Power	I-Device
Systems	I-Device
nowadays	O
.	O
</s>
<s>
Apart	O
from	O
basic	O
concepts	O
like	O
using	O
a	O
device	B-Operating_System
tree	I-Operating_System
,	O
the	O
ePAPR	O
specification	O
has	O
nothing	O
in	O
common	O
with	O
the	O
variant	O
for	O
servers	O
—	O
for	O
example	O
it	O
defines	O
a	O
completely	O
different	O
set	O
of	O
hypercalls	O
.	O
</s>
