<s>
BINAC	B-Device
(	O
Binary	B-Device
Automatic	I-Device
Computer	I-Device
)	O
was	O
an	O
early	O
electronic	O
computer	O
designed	O
for	O
Northrop	O
Aircraft	O
Company	O
by	O
the	O
Eckert	O
–	O
Mauchly	O
Computer	O
Corporation	O
(	O
EMCC	O
)	O
in	O
1949	O
.	O
</s>
<s>
Eckert	O
and	O
Mauchly	O
,	O
though	O
they	O
had	O
started	O
the	O
design	O
of	O
EDVAC	B-Device
at	O
the	O
University	O
of	O
Pennsylvania	O
,	O
chose	O
to	O
leave	O
and	O
start	O
EMCC	O
,	O
the	O
first	O
computer	O
company	O
.	O
</s>
<s>
BINAC	B-Device
was	O
their	O
first	O
product	O
,	O
the	O
first	O
stored-program	O
computer	O
in	O
the	O
United	O
States	O
;	O
BINAC	B-Device
is	O
also	O
sometimes	O
claimed	O
to	O
be	O
the	O
world	O
's	O
first	O
commercial	O
digital	O
computer	O
even	O
though	O
it	O
was	O
limited	O
in	O
scope	O
and	O
never	O
fully	O
functional	O
after	O
delivery	O
.	O
</s>
<s>
The	O
BINAC	B-Device
was	O
a	O
bit-serial	B-General_Concept
binary	O
computer	O
with	O
two	O
independent	O
CPUs	O
,	O
each	O
with	O
its	O
own	O
512-word	O
acoustic	O
mercury	O
delay-line	O
memory	B-General_Concept
.	O
</s>
<s>
BINAC	B-Device
was	O
significant	O
for	O
being	O
able	O
to	O
perform	O
high-speed	O
arithmetic	O
on	O
binary	O
numbers	O
,	O
with	O
no	O
provisions	O
to	O
store	O
characters	O
or	O
decimal	B-Application
digits	O
.	O
</s>
<s>
The	O
BINAC	B-Device
ran	O
a	O
test	O
program	O
(	O
consisting	O
of	O
23	O
instructions	O
)	O
in	O
March	O
1949	O
,	O
although	O
it	O
was	O
not	O
fully	O
functional	O
at	O
the	O
time	O
.	O
</s>
<s>
Here	O
are	O
early	O
test	O
programs	O
that	O
BINAC	B-Device
ran	O
:	O
</s>
<s>
February	O
7	O
,	O
1949	O
–	O
Ran	O
a	O
five-line	O
program	O
to	O
fill	O
the	O
memory	B-General_Concept
from	O
register	O
A	O
.	O
</s>
<s>
February	O
10	O
,	O
1949	O
–	O
Ran	O
a	O
five-line	O
program	O
to	O
check	O
memory	B-General_Concept
.	O
</s>
<s>
February	O
16	O
,	O
1949	O
–	O
Ran	O
a	O
six-line	O
program	O
to	O
fill	O
memory	B-General_Concept
.	O
</s>
<s>
April	O
4	O
,	O
1949	O
–	O
Ran	O
a	O
fifty-line	O
program	O
to	O
fill	O
memory	B-General_Concept
and	O
check	O
all	O
instructions	O
.	O
</s>
<s>
Northrop	O
accepted	O
delivery	O
of	O
BINAC	B-Device
in	O
September	O
1949	O
.	O
</s>
<s>
Northrop	O
employees	O
said	O
that	O
BINAC	B-Device
never	O
worked	O
properly	O
after	O
it	O
was	O
delivered	O
,	O
although	O
it	O
had	O
worked	O
at	O
the	O
Eckert-Mauchly	O
workshop	O
.	O
</s>
<s>
The	O
BINAC	B-Device
was	O
going	O
to	O
go	O
to	O
an	O
end	O
user	O
,	O
and	O
so	O
a	O
user	O
manual	O
was	O
needed	O
.	O
</s>
<s>
The	O
BINAC	B-Device
manual	O
writers	O
took	O
inspiration	O
from	O
those	O
manuals	O
when	O
writing	O
the	O
user	O
manual	O
for	O
the	O
BINAC	B-Device
.	O
</s>
