Amazon.com description: Product Description: This CD-ROM, with full color digital facsimiles and documentary texts of London, British Library Additional Manuscript 35287 (M), is the fifth volume of The Piers Plowman Electronic Archive, an international collaborative project devoted to electronic publication of all the medieval and renaissance witnesses to William Langland's Piers Plowman. Recognized as one of the central witnesses to the B text, M has the peculiar interest of a very extensive range of contemporary corrections and a mass of nearly contemporary and later annotations. These can only be represented by the combined hypertextual view of the text linked to color digital images. Each facsimile image is hypertextually linked to the edited text which is itself presented in four different views: a diplomatic type-facsimile; a scribal text which includes iconic indications of scribal error; a critical text with lapsus calami corrected; and an AllTags view that shows all of the editorial interventions on one screen. Minimum system requirements: PCs: 486 or later; Windows95, 98, Me, NT, XP +. Internet Explorer, Version 6.0. Macintosh users require high-end equipment (System 9 or later) running Windows emulation software. Apply to Boydell & Brewer for detailed specification.