<s>
PUPS/P3	O
is	O
an	O
implementation	O
of	O
an	O
organic	B-Application
computing	I-Application
environment	O
for	O
Linux	B-Application
which	O
provides	O
support	O
for	O
the	O
implementation	O
of	O
low	O
level	O
persistent	O
software	B-General_Concept
agents	I-General_Concept
.	O
</s>
<s>
PUPS/P3	O
is	O
a	O
cluster	O
computing	O
environment	O
derived	O
from	O
the	O
MSPS	O
operating	O
environment	O
implemented	O
on	O
the	O
BBC	B-Device
Micro	I-Device
.	O
</s>
<s>
These	O
agents	O
are	O
able	O
to	O
save	O
their	O
state	O
and	O
migrate	O
between	O
machines	O
running	O
compatible	O
Linux	B-Application
kernels	O
(	O
via	O
CRIU	B-Application
)	O
.	O
</s>
<s>
The	O
semantics	O
of	O
using	O
this	O
are	O
similar	O
to	O
those	O
used	O
by	O
the	O
free( )	O
/malloc	O
(	O
)	O
API	O
supplied	O
by	O
standard	O
C	B-Language
libraries	O
.	O
</s>
<s>
In	O
conjunction	O
with	O
virtualisation	B-General_Concept
systems	O
,	O
for	O
example	O
the	O
Oracle	B-Operating_System
VirtualBox	I-Operating_System
system	O
,	O
it	O
is	O
possible	O
to	O
use	O
PUPS/P3	O
to	O
build	O
homeostatic	O
virtual	O
(	O
Linux	B-Application
)	O
machines	O
which	O
can	O
carry	O
computational	O
payloads	O
while	O
living	O
in	O
a	O
dynamic	O
cloud	B-Architecture
environment	O
.	O
</s>
<s>
of	O
PUPS/P3	O
also	O
supports	O
container	B-Application
based	O
operating	B-Application
system	I-Application
level	I-Application
virtualization	I-Application
(	O
via	O
Docker	B-Language
(	O
software	O
)	O
and	O
check	O
pointing	O
and	O
subsequent	O
migration	O
and/or	O
restoration	O
via	O
CRIU	B-Application
.	O
</s>
