A modern play on the term “Book of Shadows,” a Wiccan practitioner’s book of magical and spiritual rituals, rites, information, and knowledge that would be copied by hand from the one used by the practitioner’s teacher or coven. In the computer age, some practitioners now store this information on a computer disk rather than in a book. Hence, a “Disk of Shadows.” When kept on removable media from earlier computers it was known as a "Floppy Disk of Shadows."