Amazon.com description: Product Description: The Piers Plowman Electronic Archive is a project to publish electronically all the medieval and renaissance witnesses to William Langland's Piers Plowman. Laud Misc. 581 presents a documentary and color facsimile of a London manuscript and the most reliable of the beta family witnesses to the B version of the poem. Every image of each text 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; 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.