The CD is designed to be read using most standard web browsers and is compatible with both Windows and Mac operating systems. Occasionally in order to view a diagram you are transported into Adobe Acrobat. a copy of which is on the CD. The CD is the culmination of a community based project based on the medieval abbey at Ramsey in Cambridgeshire. https://www.roneverhart.com/DigiCo-SD11i-Control-Surface-MADI-Only-p6714/