<s>
The	O
Sinclair	B-Device
President	I-Device
is	O
a	O
calculator	O
released	O
by	O
Sinclair	O
Radionics	O
in	O
early	O
1978	O
.	O
</s>
<s>
They	O
were	O
among	O
the	O
last	O
calculators	O
produced	O
by	O
Sinclair	O
,	O
and	O
their	O
large	O
size	O
was	O
in	O
contrast	O
to	O
the	O
smaller	O
,	O
earlier	O
models	O
,	O
like	O
the	O
Sinclair	B-Device
Executive	I-Device
,	O
which	O
made	O
the	O
company	O
famous	O
.	O
</s>
<s>
Competition	O
in	O
the	O
calculator	O
market	O
was	O
by	O
this	O
point	O
fierce	O
,	O
and	O
the	O
Sinclair	O
did	O
not	O
fare	O
well	O
against	O
cheaper	O
Japanese	O
calculators	O
with	O
more	O
efficient	O
liquid-crystal	B-Device
displays	I-Device
.	O
</s>
<s>
Power	O
was	O
supplied	O
by	O
2x	O
AA	B-Algorithm
batteries	I-Algorithm
.	O
</s>
<s>
The	O
screens	O
were	O
eight-digit	O
vacuum	B-General_Concept
fluorescent	I-General_Concept
displays	I-General_Concept
,	O
which	O
resulted	O
in	O
a	O
higher	O
power	O
consumption	O
than	O
a	O
calculator	O
with	O
a	O
liquid-crystal	B-Device
display	I-Device
.	O
</s>
