From Rocklopedia Fakebandica
1981, six-episode BBC TV series, the sequence was used a second time. I won't even mention the 1980 rerecorded and rewritten albums of the radio series or the 1984 Infocom text-based computer game version of the books. Oops, too late!
Trivia Time! Douglas Adams got the name from London real estate firm Hotblack, Desiato and Co. He saw one of their signs and became so enamored of the name he got permission to use it.