Ted Nelson (via brianlucid)
Digi-Comp II: First Edition (rolling ball binary digital mechanical computer)
a modern, fully-operational recreation of the Digi-Comp II, the classic 1960′s educational computer kit. It’s an automatic binary digital mechanical computer, capable of conducting basic operations like adding, multiplying, subtracting, dividing, counting, and so forth. And what’s more, all of these operations are conducted by the action of balls rolling down a slope, directed by mechanical switches and flip flops, and all powered by gravity.
Quad II, 1969 (Robert Mallary)
one of the first computer art sculptures. possibly.