<s>
The	O
Psion	B-Application
Revo	I-Application
,	O
launched	O
in	O
November	O
1999	O
,	O
is	O
a	O
personal	B-Application
digital	I-Application
assistant	I-Application
(	O
PDA	B-Application
)	O
from	O
Psion	B-Application
.	O
</s>
<s>
It	O
is	O
the	O
successor	O
to	O
the	O
Psion	B-Application
Series	I-Application
3	I-Application
and	O
a	O
light	O
version	O
of	O
Psion	B-Application
Series	I-Application
5mx	I-Application
.	O
</s>
<s>
The	O
Revo	O
comes	O
in	O
two	O
main	O
variants	O
,	O
Psion	B-Application
Revo	I-Application
and	O
Psion	B-Application
Revo	I-Application
Plus	O
,	O
having	O
8	O
and	O
16MB	O
of	O
random-access	B-Architecture
memory	I-Architecture
(	O
RAM	B-Architecture
)	O
respectively	O
.	O
</s>
<s>
It	O
is	O
powered	O
by	O
a	O
36MHz	O
ARM	B-Architecture
architecture	I-Architecture
710T	O
microprocessor	O
.	O
</s>
<s>
Among	O
other	O
things	O
,	O
the	O
hardware	O
is	O
equipped	O
with	O
a	O
short-range	O
Infrared	O
Data	O
Association	O
(	O
IrDA	O
)	O
wireless	O
infrared	O
communication	O
system	O
and	O
a	O
touchscreen	B-Device
.	O
</s>
<s>
Other	O
programs	O
are	O
user-installable	O
by	O
using	O
a	O
docking	B-Device
station	I-Device
to	O
send	O
Revo	O
programs	O
from	O
a	O
desktop	B-Device
computer	I-Device
.	O
</s>
<s>
SONICblue	O
Incorporated	O
produced	O
a	O
version	O
of	O
the	O
Psion	B-Application
Revo	I-Application
Plus	O
renamed	O
to	O
Diamond	B-Application
Mako	I-Application
,	O
which	O
they	O
distributed	O
in	O
the	O
United	O
States	O
and	O
Canada	O
.	O
</s>
<s>
Along	O
with	O
,	O
Psion	B-Application
made	O
two	O
versions	O
of	O
the	O
Revo	O
for	O
the	O
Chinese	O
market	O
named	O
the	O
618C	O
(	O
Traditional	O
Chinese	O
characters	O
)	O
and	O
618S	O
(	O
Simplified	O
Chinese	O
characters	O
)	O
.	O
</s>
<s>
Open-source	B-Application
software	I-Application
projects	O
were	O
begun	O
to	O
port	O
Linux	B-Application
to	O
the	O
Psion	B-Application
Revo	I-Application
and	O
other	O
Psion	B-Application
PDAs	B-Application
,	O
including	O
OpenPsion	O
,	O
formerly	O
PsiLinux	O
,	O
and	O
Revol	O
,	O
an	O
optimized	O
version	O
of	O
OpenPsion	O
for	O
the	O
Revo	O
.	O
</s>
<s>
Shortly	O
before	O
the	O
demise	O
of	O
Psion	B-Application
in	O
the	O
commercial	O
PDA	B-Application
market	O
,	O
work	O
had	O
begun	O
on	O
a	O
successor	O
to	O
the	O
Revo	O
,	O
a	O
3rd-generation	O
PDA	B-Application
with	O
the	O
codename	O
Conan	O
.	O
</s>
<s>
The	O
Conan	O
ran	O
EPOC	B-Language
Release	O
6	O
and	O
was	O
to	O
feature	O
support	O
for	O
Bluetooth	B-Protocol
and	O
a	O
backlight	O
,	O
although	O
the	O
former	O
did	O
not	O
function	O
in	O
the	O
development	O
builds	O
.	O
</s>
<s>
Unlike	O
the	O
Series	O
5mx	O
,	O
which	O
used	O
2	O
user-replaceable	O
AA	B-Algorithm
batteries	I-Algorithm
,	O
the	O
Revo	O
is	O
powered	O
by	O
2	O
built-in	O
rechargeable	O
AAA	B-Algorithm
700mAh	O
nickel	B-Device
–	I-Device
metal	I-Device
hydride	I-Device
battery	I-Device
(	O
NiMH	B-Device
)	O
batteries	O
,	O
which	O
typically	O
need	O
replacing	O
after	O
about	O
3	O
years	O
of	O
use	O
.	O
</s>
