<s>
The	O
One	B-Device
Per	I-Device
Desk	I-Device
,	O
or	O
OPD	O
,	O
was	O
an	O
innovative	O
hybrid	O
personal	O
computer/telecommunications	O
terminal	O
based	O
on	O
the	O
hardware	O
of	O
the	O
Sinclair	B-Device
QL	I-Device
.	O
</s>
<s>
The	O
One	B-Device
Per	I-Device
Desk	I-Device
was	O
built	O
by	O
International	O
Computers	O
Limited	O
(	O
ICL	O
)	O
and	O
launched	O
in	O
the	O
UK	O
in	O
1984	O
.	O
</s>
<s>
It	O
was	O
the	O
result	O
of	O
a	O
collaborative	O
project	O
between	O
ICL	O
,	O
Sinclair	O
Research	O
and	O
British	O
Telecom	O
begun	O
in	O
1983	O
,	O
originally	O
intended	O
to	O
incorporate	O
Sinclair	O
's	O
flat-screen	O
CRT	B-Device
technology	O
.	O
</s>
<s>
Rebadged	O
versions	O
of	O
the	O
OPD	O
were	O
sold	O
in	O
the	O
United	O
Kingdom	O
as	O
the	O
Merlin	B-Device
Tonto	I-Device
and	O
as	O
the	O
Computerphone	B-Device
by	O
Telecom	O
Australia	O
and	O
the	O
New	O
Zealand	O
Post	O
Office	O
.	O
</s>
<s>
The	O
initial	O
orders	O
placed	O
for	O
the	O
One	B-Device
Per	I-Device
Desk	I-Device
were	O
worth	O
£4.5	O
million	O
(	O
for	O
1500	O
units	O
)	O
from	O
British	O
Telecom	O
and	O
£8million	O
from	O
Telecom	O
Australia	O
,	O
with	O
ICL	O
focusing	O
on	O
telecommunications	O
providers	O
as	O
the	O
means	O
to	O
reach	O
small	O
-	O
and	O
medium-sized	O
businesses	O
.	O
</s>
<s>
From	O
the	O
QL	O
,	O
the	O
OPD	O
borrowed	O
the	O
68008	B-Device
CPU	B-Device
,	O
ZX8301/8302	O
ULAs	O
,	O
128	O
KB	O
of	O
RAM	O
and	O
dual	O
Microdrives	B-Device
(	O
re-engineered	O
by	O
ICL	O
for	O
greater	O
reliability	O
)	O
but	O
not	O
the	O
Intel	B-Device
8049	I-Device
Intelligent	O
Peripheral	O
Controller	O
.	O
</s>
<s>
Unique	O
to	O
the	O
OPD	O
was	O
a	O
"	O
telephony	O
module	O
"	O
incorporating	O
an	O
Intel	B-Architecture
8051	I-Architecture
microcontroller	B-Architecture
(	O
which	O
also	O
controlled	O
the	O
keyboard	O
)	O
,	O
two	O
PSTN	O
lines	O
and	O
a	O
V.21/V.23	O
modem	B-Application
,	O
plus	O
a	O
built-in	O
telephone	O
handset	O
and	O
a	O
TI	O
TMS5220	B-Application
speech	O
synthesiser	O
(	O
for	O
automatic	O
answering	O
of	O
incoming	O
calls	O
)	O
.	O
</s>
<s>
Later	O
,	O
3.5	B-Device
"	I-Device
floppy	I-Device
disk	I-Device
drives	O
were	O
also	O
available	O
from	O
third-party	O
vendors	O
.	O
</s>
<s>
The	O
system	O
firmware	O
(	O
BFS	O
or	O
"	O
Basic	O
Functional	O
Software	O
"	O
)	O
was	O
unrelated	O
to	O
the	O
QL	O
's	O
Qdos	B-Operating_System
operating	O
system	O
,	O
although	O
a	O
subset	O
of	O
SuperBASIC	B-Language
was	O
provided	O
on	O
Microdrive	O
cartridge	O
.	O
</s>
<s>
The	O
BFS	O
provided	O
application-switching	O
,	O
voice/data	O
call	O
management	O
,	O
call	O
answering	O
,	O
phone	O
number	O
directories	O
,	O
viewdata	B-Application
terminal	O
emulation	O
and	O
a	O
simple	O
calculator	O
.	O
</s>
<s>
The	O
Psion	B-Application
applications	O
suite	O
bundled	O
with	O
the	O
QL	O
was	O
also	O
ported	O
to	O
the	O
OPD	O
as	O
Xchange	O
and	O
was	O
available	O
as	O
an	O
optional	O
ROM	B-Device
pack	O
,	O
priced	O
at	O
£130	O
.	O
</s>
<s>
Other	O
optional	O
application	O
software	O
available	O
on	O
ROM	B-Device
included	O
various	O
terminal	O
emulators	O
such	O
as	O
Satellite	O
Computing	O
's	O
ICL7561	B-Device
emulator	O
,	O
plus	O
their	O
Action	O
Diary	O
and	O
Presentation	O
Software	O
,	O
address	O
book	O
,	O
and	O
inter-OPD	O
communications	O
utilities	O
.	O
</s>
<s>
The	O
integral	O
V.23	O
dialup	O
modem	B-Application
was	O
used	O
to	O
provide	O
remote	O
communications	O
to	O
the	O
central	O
server	O
.	O
</s>
<s>
Several	O
UK	O
ICL	O
Mainframe	B-Architecture
(	O
Series	B-Device
39	I-Device
)	O
customers	O
,	O
in	O
Local	O
Government	O
and	O
Ministry	O
of	O
Defence	O
sectors	O
,	O
used	O
statistics	O
applications	O
on	O
OPD	O
systems	O
to	O
view	O
graphical	O
representations	O
of	O
mainframe	B-Architecture
reports	O
.	O
</s>
<s>
Once	O
again	O
,	O
the	O
integral	O
V.23	O
modem	B-Application
was	O
used	O
to	O
download	O
from	O
the	O
mainframe	B-Architecture
.	O
</s>
<s>
BT	O
intended	O
the	O
Tonto	O
to	O
be	O
a	O
centralised	O
desktop	O
information	O
system	O
able	O
to	O
access	O
online	O
services	O
,	O
mainframes	B-Architecture
and	O
other	O
similar	O
systems	O
through	O
the	O
BT	O
telephone	O
network	O
.	O
</s>
<s>
OPD	O
peripherals	O
and	O
software	O
ROM	B-Device
cartridges	O
were	O
also	O
badged	O
under	O
the	O
Merlin	O
brand	O
.	O
</s>
<s>
A	O
data	O
communications	O
adapter	O
was	O
introduced	O
for	O
the	O
Tonto	O
as	O
a	O
plug-in	O
option	O
or	O
fitted	O
on	O
new	O
units	O
,	O
providing	O
a	O
standard	O
RS423	O
interface	O
for	O
use	O
with	O
mainframe	B-Architecture
computers	I-Architecture
or	O
data	O
communications	O
networks	O
,	O
permitting	O
the	O
use	O
of	O
the	O
Tonto	O
as	O
a	O
VT100	B-Device
terminal	O
.	O
</s>
<s>
A	O
separate	O
VT	O
Link	O
product	O
provided	O
support	O
for	O
VT52	B-Application
and	O
VT100	B-Device
emulation	O
for	O
mainframe	B-Architecture
access	O
over	O
dial-up	O
connections	O
.	O
</s>
<s>
Aimed	O
at	O
the	O
"	O
office	O
automation	O
"	O
market	O
and	O
seeking	O
to	O
integrate	O
computing	O
and	O
telecommunications	O
technology	O
,	O
combining	O
support	O
for	O
both	O
voice	O
and	O
data	O
,	O
the	O
One	B-Device
Per	I-Device
Desk	I-Device
product	O
was	O
perceived	O
as	O
the	O
first	O
of	O
its	O
kind	O
designed	O
to	O
meet	O
the	O
needs	O
of	O
managers	O
,	O
who	O
would	O
be	O
relying	O
on	O
old-fashioned	O
paper-based	O
practices	O
to	O
perform	O
their	O
"	O
complex	O
and	O
heavy	O
workloads	O
"	O
involving	O
a	O
variety	O
of	O
ongoing	O
activities	O
including	O
meetings	O
,	O
telephone	O
calls	O
,	O
research	O
,	O
administration	O
and	O
numerous	O
other	O
tasks	O
.	O
</s>
<s>
Such	O
potential	O
users	O
of	O
information	O
technology	O
had	O
apparently	O
been	O
ignored	O
by	O
office	O
automation	O
efforts	O
,	O
and	O
personal	B-Device
computers	I-Device
were	O
perceived	O
as	O
"	O
exceeding	O
most	O
managers	O
 '	O
requirements	O
"	O
.	O
</s>
<s>
The	O
ComputerPhone	B-Device
attempted	O
to	O
sit	O
between	O
more	O
specialised	O
telephony	O
devices	O
and	O
more	O
advanced	O
workstations	O
,	O
being	O
marketed	O
as	O
an	O
"	O
executive	O
"	O
workstation	O
in	O
Australia	O
,	O
somewhat	O
more	O
towards	O
middle	O
management	O
in	O
New	O
Zealand	O
.	O
</s>
<s>
Advertisements	O
emphasised	O
the	O
telephony	O
,	O
office	O
suite	O
,	O
desktop	O
calculator	O
,	O
videotex	B-Operating_System
,	O
terminal	O
and	O
electronic	O
messaging	O
capabilities	O
.	O
</s>
<s>
This	O
had	O
a	O
68008FN	O
CPU	B-Device
,	O
256	O
KB	O
of	O
RAM	O
as	O
standard	O
,	O
an	O
RS-232	O
port	O
and	O
enhanced	O
firmware	O
.	O
</s>
