<s>
A	O
domino	B-Device
computer	I-Device
is	O
a	O
mechanical	B-Device
computer	I-Device
built	O
using	O
dominoes	B-Operating_System
to	O
represent	O
mechanical	O
amplification	O
or	O
logic	O
gating	O
of	O
digital	O
signals	O
.	O
</s>
<s>
Sequences	O
of	O
standing	O
dominoes	B-Operating_System
(	O
so	O
that	O
each	O
domino	B-Operating_System
topples	O
the	O
next	O
one	O
)	O
can	O
be	O
arranged	O
to	O
demonstrate	O
digital	O
concepts	O
such	O
as	O
amplification	O
and	O
digital	O
signals	O
.	O
</s>
<s>
Since	O
digital	O
information	O
is	O
conducted	O
by	O
a	O
string	O
of	O
dominoes	B-Operating_System
,	O
this	O
effect	O
differs	O
from	O
phenomena	O
where	O
:	O
</s>
<s>
The	O
Domino	B-Operating_System
Day	O
event	O
shows	O
many	O
constructs	O
,	O
mainly	O
for	O
the	O
purposes	O
of	O
entertainment	O
.	O
</s>
<s>
It	O
is	O
possible	O
to	O
use	O
this	O
phenomenon	O
for	O
constructing	O
unconventional	B-Device
computing	I-Device
tools	O
.	O
</s>
<s>
The	O
logic	O
gate	O
OR	O
is	O
very	O
natural	O
in	O
dominoes	B-Operating_System
.	O
</s>
<s>
Note	O
that	O
no	O
domino	B-Operating_System
gate	O
can	O
produce	O
output	O
1	O
with	O
all	O
inputs	O
0	O
,	O
</s>
<s>
so	O
there	O
is	O
no	O
NOT	O
gate	O
,	O
making	O
it	O
impossible	O
to	O
make	O
an	O
IMPLY	B-General_Concept
gate	I-General_Concept
without	O
an	O
external	O
'	O
power	O
source	O
 '	O
sequence	O
.	O
</s>
<s>
The	O
current	O
record	O
for	O
biggest	O
domino	B-Device
computer	I-Device
is	O
a	O
5-bit	O
adder	O
.	O
</s>
<s>
At	O
the	O
Manchester	O
Science	O
Festival	O
in	O
2012	O
,	O
mathematician	O
Matt	O
Parker	O
and	O
a	O
team	O
of	O
volunteers	O
worked	O
together	O
to	O
build	O
a	O
domino	B-Operating_System
binary	O
adder	O
which	O
could	O
add	O
two	O
three-bit	O
inputs	O
and	O
produce	O
a	O
3-bit	O
output	O
,	O
which	O
ran	O
successfully	O
.	O
</s>
<s>
The	O
following	O
day	O
,	O
they	O
attempted	O
to	O
build	O
a	O
4-bit	O
adder	O
,	O
which	O
they	O
completed	O
,	O
but	O
the	O
final	O
test	O
run	O
had	O
some	O
errors	O
(	O
one	O
due	O
to	O
signal	O
bleed	O
between	O
chains	O
of	O
dominoes	B-Operating_System
,	O
and	O
one	O
timing	O
issue	O
)	O
.	O
</s>
<s>
In	O
2018	O
,	O
at	O
Bank	O
Muscat	O
headquarters	O
in	O
Oman	O
,	O
a	O
team	O
of	O
American	O
British	O
Academy	O
(	O
ABA	O
)	O
Grade	O
12	O
students	O
led	O
by	O
Saatvik	O
Suryajit	O
Korisepati	O
,	O
assisted	O
by	O
Alex	O
Freyer	O
,	O
Zoltan	O
Sojitory	O
,	O
and	O
other	O
computer	O
students	O
,	O
used	O
15,000	O
dominoes	B-Operating_System
to	O
build	O
a	O
5-bit	O
adder	O
able	O
to	O
add	O
any	O
numbers	O
up	O
to	O
the	O
sum	O
of	O
63	O
.	O
</s>
