<s>
Simon	B-Device
was	O
a	O
relay-based	O
computer	O
,	O
described	O
by	O
Edmund	O
Berkeley	O
in	O
a	O
series	O
of	O
thirteen	O
construction	O
articles	O
in	O
Radio-Electronics	O
magazine	O
,	O
from	O
October	O
1950	O
.	O
</s>
<s>
Intended	O
for	O
the	O
educational	O
purpose	O
of	O
demonstrating	O
the	O
concept	O
of	O
digital	O
computer	O
,	O
it	O
could	O
not	O
be	O
used	O
for	O
any	O
significant	O
practical	O
computation	O
since	O
it	O
had	O
only	O
two	O
bits	O
of	O
memory	B-General_Concept
.	O
</s>
<s>
Some	O
have	O
described	O
it	O
as	O
the	O
"	O
first	O
personal	B-Device
computer	I-Device
"	O
,	O
although	O
its	O
extremely	O
limited	O
capacity	O
and	O
its	O
unsuitability	O
for	O
use	O
for	O
any	O
purpose	O
other	O
than	O
as	O
an	O
educational	O
demonstration	O
make	O
that	O
classification	O
questionable	O
.	O
</s>
<s>
The	O
"	O
Simon	B-Device
project	O
"	O
arose	O
as	O
a	O
result	O
of	O
the	O
Berkeley	O
's	O
book	O
Giant	O
Brains	O
,	O
or	O
Machines	O
That	O
Think	O
,	O
published	O
in	O
November	O
1949	O
.	O
</s>
<s>
In	O
November	O
1950	O
,	O
Berkeley	O
wrote	O
an	O
article	O
titled	O
Simple	O
Simon	B-Device
for	O
Scientific	O
American	O
magazine	O
,	O
that	O
described	O
digital	O
computing	O
principles	O
to	O
the	O
general	O
public	O
.	O
</s>
<s>
Despite	O
Simon	B-Device
's	O
extreme	O
lack	O
of	O
resources	O
(	O
it	O
could	O
only	O
represent	O
the	O
numbers	O
0	O
,	O
1	O
,	O
2	O
and	O
3	O
)	O
,	O
Berkeley	O
stated	O
on	O
page	O
40	O
that	O
the	O
machine	O
"	O
possessed	O
the	O
two	O
unique	O
properties	O
that	O
define	O
any	O
true	O
mechanical	O
brain	O
:	O
it	O
can	O
transfer	O
information	O
automatically	O
from	O
any	O
one	O
of	O
its	O
"	O
registers	B-General_Concept
"	O
to	O
any	O
other	O
,	O
and	O
it	O
can	O
perform	O
reasoning	O
operations	O
of	O
indefinite	O
length.	O
"	O
</s>
<s>
The	O
Simon	B-Device
's	O
architecture	B-General_Concept
was	O
based	O
on	O
relays	O
.	O
</s>
<s>
The	O
registers	B-General_Concept
and	O
ALU	B-General_Concept
stored	O
only	O
2	O
bits	O
.	O
</s>
<s>
The	O
user	O
entered	O
data	O
via	O
punched	B-Device
paper	I-Device
,	O
or	O
by	O
five	O
keys	O
on	O
the	O
front	B-Device
panel	I-Device
.	O
</s>
<s>
The	O
punched	O
tape	O
served	O
not	O
only	O
for	O
data	O
entry	O
,	O
but	O
also	O
as	O
memory	B-General_Concept
storage	O
.	O
</s>
