<s>
The	O
SAPO	B-Device
(	O
short	O
for	O
Samočinný	O
počítač	O
,	O
“	O
automatic	O
computer	O
”	O
)	O
was	O
the	O
first	O
Czechoslovak	O
computer	O
.	O
</s>
<s>
The	O
computer	O
was	O
the	O
first	O
fault-tolerant	B-General_Concept
computer	O
–	O
it	O
had	O
three	O
parallel	O
arithmetic	B-General_Concept
logic	I-General_Concept
units	I-General_Concept
,	O
which	O
decided	O
on	O
the	O
correct	O
result	O
by	O
voting	O
,	O
an	O
example	O
of	O
triple	B-Error_Name
modular	I-Error_Name
redundancy	I-Error_Name
(	O
if	O
all	O
three	O
results	O
were	O
different	O
,	O
the	O
operation	O
was	O
repeated	O
)	O
.	O
</s>
<s>
SAPO	B-Device
was	O
designed	O
between	O
1950	O
and	O
1956	O
by	O
a	O
team	O
led	O
by	O
Czechoslovak	O
cybernetics	O
pioneer	O
Antonín	O
Svoboda	O
.	O
</s>
<s>
It	O
was	O
an	O
electromechanical	O
design	O
with	O
7,000	O
relays	O
and	O
400	O
vacuum	O
tubes	O
,	O
and	O
a	O
magnetic	B-General_Concept
drum	I-General_Concept
memory	I-General_Concept
with	O
capacity	O
of	O
1024	O
32-bit	O
words	O
.	O
</s>
