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Les Levine’s Systems Burn-Off X Residual Software was also intended to be fully interactive:

The original installation at the Phyllis Kind Gallery in Chicago was comprised of 1000 copies of each of 31 photographs taken by Levine at the March, 1969 opening of the highly publicized ‘Earthworks’ exhibition in Ithaca, New York … Most of the 31,000 photographs, which documented the media event, were [according to the catalogue] ‘randomly distributed on the floor and covered with jello; some were stuck to the wall with chewing gum; the rest were for sale’ … Levine conceived of the 31,000 individual photos as the residual effects or ‘burn-off’ of the information system he created – as the material manifestation of software.

Source : http://systemsart.org/halsall_paper.html