 With David Wise, Friedman wrote a highly influential paper on lazy programming, specifically on lazy streams (ICALP 1976).The paper, entitled "Cons should not evaluate its arguments,"  is one of the first publications pushing for the exploration of a programming style with potentially infinite data structures and a form of programming that employs no computational effects (though programs may diverge).Over the 1970s, Friedman and Wise explored the topic in depth and also considered extensions to the world of parallel computing.