<s>
The	O
Elliott	B-Device
503	I-Device
was	O
a	O
transistorized	B-Device
computer	I-Device
introduced	O
by	O
Elliott	O
Brothers	O
in	O
1963	O
.	O
</s>
<s>
It	O
was	O
software-compatible	O
with	O
the	O
earlier	O
Elliott	B-Device
803	I-Device
but	O
was	O
about	O
70	O
times	O
faster	O
and	O
a	O
more	O
powerful	O
machine	O
.	O
</s>
