Hugh Darwen, employee of IBM UK from 1967 to 2004, has been involved in the history of the relational model since the beginning. From 1978 to 1982 he was a chief architect on Business System 12, a database management system that faithfully embraced the principles of the relational model. He works closely with Christopher J. Date and represented IBM at the ISO SQL committee (JTC 1/SC 32/WG 3 Database languages) until his retirement from IBM. Wikipedia
The definitive Wikipedia entry for Hugh Darwen. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Hugh_Darwen
