The General Prologue on CD-ROM presents full materials for detailed study of the text of The General Prologue of The Canterbury Tales, the most read of all parts of the Tales. The CD-ROM contains transcripts, descriptions, images, and collations of all fifty-three fifteenth-century manuscripts and early printed editions of The General Prologue. Specialized software tools allow searching of the text, exploration of the spelling of the 300,000 words in the manuscripts in spelling databases, and reconstruction of the history of the textual tradition.