Stan VanDerBeek and Ken Knowlton at Bell Labs collaborated on a series of digital structuralist computer/graphic/text animations in 1966. They used BeFLIX, [Bell Flicks], an 8-bit graphics programming language Knowlton developed in 1963.
The Tate's clean version of Poemfield No. 2 isn't loading right now, so here's the YouTube version:
Meanwhile, go back to the Tate's site for several other crisp copies of VanDerBeek's works.
update: Fuller, VanDerBeek, Cage, I'm just following Steve Roden around. Check out the collection of 1967-8 event posters from the University of Illinois he just posted.