<s>
UMC	B-Device
(	O
Uniwersalna	O
Maszyna	O
Cyfrowa	O
-	O
Polish	O
for	O
Universal	O
Digital	O
Machine	O
)	O
is	O
a	O
family	O
of	O
computers	O
produced	O
by	O
Elwro	O
from	O
1962	O
.	O
</s>
<s>
It	O
consisted	O
of	O
vacuum-tube	O
based	O
UMC-1	O
and	O
transistor-based	O
UMC-10	O
(	O
1964	O
)	O
.	O
</s>
<s>
UMC	B-Device
computers	O
operated	O
using	O
negabinary	B-Algorithm
(	O
-2	O
base	O
)	O
numeral	O
system	O
invented	O
by	O
prof	O
.	O
Zdzisław	O
Pawlak	O
.	O
</s>
