These days cars are smarter and more feature-packed than ever, but sometimes it's the simple, little things that can make all the difference. There's one now-ubiquitous detail that benefits millions of drivers every single day, saving them time and reducing stress, and you may not even realize it was something that needed to be invented — or how recently it was thought up. I'm talking about the little arrow in your gauge cluster that tells you which side of the car the fuel filler is on, which was thought up in 1986 by former Ford employee James Moylan, who died on December 11 at age 80. Automotive News' obituary tells his story, which is further proof that the best ideas really can come from anywhere. //

He sent it off to his boss and promptly forgot all about it, until getting a reply seven months later from R. F. Zokas, a director of interior design, who said the arrow would be added to 1989 model year cars that were under development. The 1989 Ford Escort and Mercury Tracer were the first to use it, followed by the Ford Thunderbird and Mercury Cougar. //

There isn't a lot of information or a consensus out there about which brands were next to adopt the Moylan arrow or when it started happening, but it doesn't seem to have started getting widespread until later in the 1990s.