1986. Shows how little has truly changed. I think this quote from that paper is one of the most apt for the LLM age: "The hardest single part of building a software system is deciding precisely what to build."
In the mid-2010s I was working with my biz dev guy on a product concept that was in the low-code/no-code space with a heavy dose of pre-transformer AI and that paper was a north star, as it is for any serious thinking about low/no.