<s>
IS/1	O
was	O
the	O
world	O
's	O
first	O
relational	B-Application
database	I-Application
system	O
,	O
implemented	O
at	O
the	O
IBM	O
United	O
Kingdom	O
Scientific	O
Centre	O
in	O
Peterlee	O
in	O
the	O
years	O
1970	O
–	O
1972	O
.	O
</s>
<s>
It	O
was	O
the	O
precursor	O
to	O
PRTV	B-Application
.	O
</s>
