1 The free Unix clone NetBSD supports runs almost any existing hardware platform including IBM-compatible PCs, palmtops, video game consoles, old Amiga and Atari home computers and proprietary Unix servers.

2 Jack Burnham. Systems Esthetics. Artforum, 9 1968. http://www.arts.ucsb.edu/faculty/jevbratt/classes_previous/fall_03/arts_22/Burnham_Systems_Esthetics.html . [ 16 ]

3 Donald E. Knuth. The Art of Computer Programming. Addison-Wesley, Reading, Massachusetts, 1973-1998. [ 55 ], Paul Graham. Hackers and Painters. O’Reilly, Sebastopol, 2004. [ 40 ]