The title 'The Division Bell' was an idea of Douglas Adams, who had been friends of various member of Pink Floyd for years.
After being asked by David Gilmour to work on some of the lyrics on the album, Adams was approached by Gilmour to see if Adams had any suggestions for the title of the album, which was needed in a hurry. In exchange for a £5,000 contribution to the Environmental Investigation Agency, one of Adams favourite charities, he suggested 'The Division Bell'