Documents, code, and an emulation related to the functioning of the Mac diskette containing William Gibson’s poem in Agrippa. The diskette contained a custom-built program that rendered the poem as black text on white background scrolling up the screen at an unstoppable pace, and also a custom-built encryption program that then made the poem “disappear” after it had been seen once. In these documents, the programmer’s name and signature have been blacked out due to his wish (according to Agrippa’s publisher) to remain anonymous.