Paul was born John Paul Rodker, the son of John Rodker, writer, translator, and publisher, and the artist, Barbara Stanger McKenzie-Smith, in London, England. His name was changed to Morrison by deed poll when his mother remarried. He was educated at the Dragon School, Eton and King's College, Cambridge, where he studied Anthropology and Archaeology. He switched to the expanding computer field, going to work for IBM UK in 1959, moved to the US where he worked for IBM for 5 years, and then moved to Canada and became a Canadian citizen - first in Montreal, and then in and around Toronto. He retired from IBM in 1992, worked for a major bank for 2 1/2 years, and then as a contractor for 10 more years. He now lives and consults in Unionville, Ontario.