The rotating laser appeared in the early 1970s, and in a September 1978 article Concrete Construction declared that lasers were “no longer a solution looking for a problem” but rather “the most significant advancement in construction measurement history” (cover photo September 1978). The article described such applications as grading with a laser-controlled bulldozer and using lasers to control subgrade and concrete floor slab elevations, and included a sidebar titled, “Are Construction Lasers Safe?” Less than a decade later the Laser Screed hit the market.