Ostoja-Kotkowski, Stanisław, 1990-1991, Computer file, PRG 919/107/75/X
X is a pixel based artwork, created through computer programs on an Acorn Archimedes computer. A fractal generator may have been used, in conjunction with other software and assorted manipulation techniques to create a sequence of images or multiple iterations of the image design. It was included on the same disk as 2X, XX, and 3X.