Nelson Goodman, “The Theory of Notation” (Chapter Four), Languages of Art (Hackett,
1976): 127-173 [for this and other readings, you’ll be
prompted to enter a username (student) and password
(seecritfilez)].
Florian Cramer and Matthew Fuller, “Interface” in Software Studies, ed., Matthew Fuller
(MIT Press, 2008): 149-53.