What is the name of the hyper-intellectual robot in the "Hitchhiker's Guide to the Galaxy" series?

I first read these books as a child and I've loved them ever since

used to listen to it o the radio on a Sunday evening in 1977 the the series came on TV, brilliant

Douglas said himself that he was born in 1953.. The year that DNA was discovered and also his initials. His middle name began with N.