Art in which the idea matters more than the finished object, a movement of the mid-1960s and 1970s. Sol LeWitt wrote in 1967 that 'the idea becomes a machine that makes the art', a line generative artists often quote.
And Sol LeWitt really plays a major role in this by coining the phrase conceptual art in this essay from 1967. This is where he gives the movement its name.
Peter Bauman, Michael Spalter on 1960s Computer Art
Information was completely focused on conceptual art, working with language, systems and rules. Software was, of course, artists working with code directly.
Casey Reas, Casey Reas on the History of Generative Art - Part 1