<s>
CALDIC	B-Device
(	O
the	O
California	B-Device
Digital	I-Device
Computer	I-Device
)	O
was	O
an	O
electronic	O
digital	O
computer	O
built	O
with	O
the	O
assistance	O
of	O
the	O
Office	O
of	O
Naval	O
Research	O
at	O
the	O
University	O
of	O
California	O
,	O
Berkeley	O
between	O
1951	O
and	O
1955	O
to	O
assist	O
and	O
enhance	O
research	O
being	O
conducted	O
at	O
the	O
university	O
with	O
a	O
platform	O
for	O
high-speed	O
computing	O
.	O
</s>
<s>
CALDIC	B-Device
was	O
designed	O
to	O
be	O
constructed	O
at	O
a	O
low	O
cost	O
and	O
simple	O
to	O
operate	O
,	O
by	O
standards	O
of	O
the	O
time	O
,	O
note	O
that	O
in	O
a	O
pre-1965	O
context	O
there	O
is	O
no	O
interactive	O
user	O
IO	O
or	O
human	O
readable	O
output	O
in	O
printed	O
characters	O
in	O
most	O
computers	O
.	O
</s>
<s>
It	O
was	O
a	O
serial	B-Algorithm
decimal	I-Algorithm
machine	O
with	O
an	O
,	O
10,000	O
-word	O
magnetic	O
drum	O
memory	O
.	O
</s>
<s>
(	O
As	O
CALDIC	B-Device
's	O
decimal	O
words	O
were	O
10	O
digits	O
each	O
,	O
the	O
magnetic	O
memory	O
could	O
store	O
about	O
400,000	O
bits	O
.	O
)	O
</s>
<s>
CALDIC	B-Device
was	O
a	O
stored	B-Architecture
program	I-Architecture
computer	O
with	O
a	O
six-digit	O
instruction	O
format	O
(	O
two	O
digits	O
for	O
the	O
opcode	B-Language
and	O
four	O
digits	O
for	O
the	O
memory	O
address	O
)	O
.	O
</s>
<s>
The	O
computer	O
was	O
initially	O
planned	O
by	O
Paul	O
Morton	O
,	O
Leland	O
Cunningham	O
,	O
and	O
Dick	O
Lehmer	O
;	O
the	O
latter	O
two	O
had	O
been	O
involved	O
with	O
the	O
ENIAC	B-Device
at	O
the	O
University	O
of	O
Pennsylvania	O
,	O
and	O
Lehmer	O
had	O
given	O
one	O
of	O
the	O
Moore	O
School	O
Lectures	O
.	O
</s>
<s>
Morton	O
oversaw	O
the	O
design	O
and	O
construction	O
with	O
a	O
team	O
comprising	O
electrical	O
engineering	O
graduate	O
and	O
undergraduate	O
students	O
at	O
the	O
university	O
,	O
more	O
than	O
35	O
in	O
total	O
,	O
including	O
Doug	O
Engelbart	O
(	O
who	O
later	O
invented	O
the	O
computer	B-Device
mouse	I-Device
)	O
and	O
Al	O
Hoagland	O
(	O
a	O
pioneer	O
of	O
the	O
computer	O
disk	O
industry	O
)	O
.	O
</s>
