<s>
The	O
PB	B-Device
250	I-Device
(	O
later	O
Raytheon	O
250	O
)	O
was	O
a	O
general-purpose	O
computer	O
introduced	O
in	O
1960	O
by	O
the	O
Packard	O
Bell	O
Corporation	O
.	O
</s>
<s>
The	O
logic	O
design	O
has	O
similarities	O
with	O
the	O
Bendix	B-Device
G-15	I-Device
computer	O
,	O
which	O
in	O
turn	O
was	O
based	O
on	O
Alan	O
Turing	O
’s	O
Pilot	B-Device
ACE	I-Device
.	O
</s>
<s>
The	O
circuits	O
were	O
derived	O
from	O
the	O
TRICE	O
digital	B-Device
differential	I-Device
analyzer	I-Device
.	O
</s>
<s>
The	O
PB250	O
used	O
a	O
Flexowriter	B-Application
as	O
a	O
console	B-General_Concept
.	O
</s>
<s>
In	O
TRICE	O
models	O
TC5108/250	O
and	O
TC5036/250	O
hybrid	B-Device
computers	I-Device
.	O
</s>
<s>
In	O
Hycomp	O
250	O
hybrid	B-Device
computer	I-Device
,	O
later	O
replaced	O
by	O
PB440	O
.	O
</s>
<s>
PB	B-Device
250	I-Device
was	O
licensed	O
to	O
SETI	O
(	O
)	O
.	O
</s>
