IS/1 was the world's first relational database system, implemented at the IBM

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the European mainland, continental mainland. It comprises England, Scotlan ...

Scientific Centre in

Peterlee Peterlee is a town in County Durham, England. It lies between Sunderland to the north, Hartlepool to the south, the Durham Coast to the east and Durham to the west. It gained town status in 1948 under the New Towns Act 1946. The act also cre ...

in the years 1970–1972.Notley, M, "Peterlee IS/1 System", UKSC Report 18, 1972 It had limited facilities but implemented a true relational model. It was the precursor to

PRTV PRTV (''Peterlee Relational Test Vehicle'') was the world's first relational database management system that could handle significant data volumes. It was a relational query system with powerful query facilities, but very limited update facility a ...

References

IS1 Relational database management systems {{database-software-stub