<s>
The	O
TRADIC	B-Device
(	O
for	O
TRAnsistor	O
DIgital	O
Computer	O
or	O
TRansistorized	O
Airborne	O
DIgital	O
Computer	O
)	O
was	O
the	O
first	O
transistorized	B-Device
computer	I-Device
in	O
the	O
USA	O
,	O
completed	O
in	O
1954	O
.	O
</s>
<s>
Several	O
models	O
were	O
completed	O
:	O
TRADIC	B-Device
Phase	O
One	O
computer	O
,	O
Flyable	O
TRADIC	B-Device
,	O
Leprechaun	O
(	O
using	O
germanium	O
alloy	O
junction	O
transistors	O
in	O
1956	O
)	O
and	O
XMH-3	O
TRADIC	B-Device
.	O
</s>
<s>
TRADIC	B-Device
Phase	O
One	O
was	O
developed	O
to	O
explore	O
the	O
feasibility	O
,	O
in	O
the	O
laboratory	O
,	O
of	O
using	O
transistors	O
in	O
a	O
digital	O
computer	O
that	O
could	O
be	O
used	O
to	O
solve	O
aircraft	O
bombing	O
and	O
navigation	O
problems	O
.	O
</s>
<s>
Flyable	O
TRADIC	B-Device
was	O
used	O
to	O
establish	O
the	O
feasibility	O
of	O
using	O
an	O
airborne	O
solid-state	O
computer	O
as	O
the	O
control	O
element	O
of	O
a	O
bombing	O
and	O
navigation	O
system	O
.	O
</s>
<s>
The	O
TRADIC	B-Device
Phase	O
One	O
computer	O
was	O
completed	O
in	O
January	O
1954	O
.	O
</s>
<s>
The	O
TRADIC	B-Device
Phase	O
One	O
computer	O
has	O
been	O
claimed	O
to	O
be	O
the	O
world	O
's	O
first	O
fully	O
transistorized	B-Device
computer	I-Device
,	O
ahead	O
of	O
the	O
Mailüfterl	B-Device
in	O
Austria	O
or	O
the	O
Harwell	B-Device
CADET	I-Device
in	O
the	O
UK	O
,	O
which	O
were	O
each	O
completed	O
in	O
1955	O
.	O
</s>
<s>
In	O
the	O
UK	O
,	O
the	O
Manchester	O
University	O
Transistor	B-Device
Computer	I-Device
demonstrated	O
a	O
working	O
prototype	O
in	O
1953	O
which	O
incorporated	O
transistors	O
before	O
TRADIC	B-Device
was	O
operational	O
,	O
although	O
that	O
was	O
not	O
a	O
fully	O
transistorized	B-Device
computer	I-Device
because	O
it	O
used	O
vacuum	O
tubes	O
to	O
generate	O
the	O
clock	O
signal	O
.	O
</s>
<s>
The	O
30watts	O
of	O
power	O
for	O
the	O
1MHz	O
clock	O
in	O
the	O
TRADIC	B-Device
was	O
also	O
supplied	O
by	O
a	O
vacuum	O
tube	O
supply	O
because	O
no	O
transistors	O
were	O
available	O
that	O
could	O
supply	O
that	O
much	O
power	O
at	O
that	O
frequency	O
.	O
</s>
<s>
If	O
the	O
TRADIC	B-Device
can	O
be	O
called	O
fully	O
transistorized	O
while	O
incorporating	O
vacuum	O
tubes	O
,	O
then	O
the	O
Manchester	O
University	O
Transistor	B-Device
Computer	I-Device
should	O
also	O
be	O
,	O
in	O
which	O
case	O
that	O
is	O
the	O
first	O
transistorized	B-Device
computer	I-Device
and	O
not	O
the	O
TRADIC	B-Device
.	O
</s>
<s>
If	O
neither	O
can	O
be	O
called	O
fully	O
transistorized	O
,	O
then	O
the	O
CADET	B-Device
was	O
the	O
first	O
fully	O
transistorized	B-Device
computer	I-Device
in	O
February	O
1955	O
.	O
</s>
<s>
Flyable	O
TRADIC	B-Device
also	O
incorporated	O
a	O
single	O
high-power	O
output	O
vacuum-tube	O
amplifier	O
to	O
supply	O
clock	O
power	O
to	O
the	O
system	O
.	O
</s>
<s>
So	O
by	O
the	O
same	O
criterion	O
of	O
incorporating	O
vacuum	O
tubes	O
the	O
flyable	O
TRADIC	B-Device
was	O
either	O
not	O
a	O
fully	O
transistorized	B-Device
computer	I-Device
,	O
or	O
followed	O
the	O
Manchester	O
University	O
Transistor	B-Device
Computer	I-Device
in	O
1953	O
.	O
</s>
<s>
In	O
contrast	O
,	O
the	O
operating	O
requirements	O
for	O
the	O
Flyable	O
TRADIC	B-Device
included	O
performing	O
across	O
a	O
wide	O
temperature	O
range	O
of	O
-55	O
°C	O
(	O
-67	O
°F	O
)	O
to	O
+55°C	O
( +131°F	O
)	O
.	O
</s>
<s>
The	O
TRADIC	B-Device
Phase	O
One	O
Computer	O
had	O
684	O
Bell	O
Labs	O
Type	O
1734	O
Type	O
A	O
cartridge	O
transistors	O
and	O
10,358	O
germanium	O
point-contact	O
diodes	O
.	O
</s>
<s>
The	O
TRADIC	B-Device
was	O
small	O
and	O
light	O
enough	O
to	O
be	O
installed	O
in	O
a	O
B-52	O
Stratofortress	O
.	O
</s>
<s>
Programs	O
for	O
the	O
TRADIC	B-Device
Phase	O
One	O
Computer	O
were	O
introduced	O
via	O
a	O
removable	O
plugboard	O
,	O
while	O
the	O
Flyable	O
TRADIC	B-Device
used	O
a	O
Mylar	O
sheet	O
with	O
punched	O
holes	O
—	O
a	O
system	O
reminiscent	O
of	O
punched-card	O
storage	O
.	O
</s>
<s>
TRADIC	B-Device
could	O
perform	O
a	O
million	O
logical	O
operations	O
every	O
second	O
,	O
close	O
to	O
,	O
but	O
not	O
as	O
fast	O
as	O
the	O
vacuum	O
tube	O
computers	O
of	O
the	O
day	O
,	O
using	O
its	O
1MHz	O
clock	O
.	O
</s>
