And yes, it also kind of looks like those hospital signs:
Especially the Iowa Hospital Association:
But nothing is as similar to Clinton's "H" as the English supermarket chain Hillards, as IJReview noted. Hillards no longer exists; it was the victim of a hostile takeover by rival Texco in 1987, according to the Telegraph:
Comparing modern campaign logos to brand logos they look like has become an Internet pastime. Obama's "O" was compared with Pepsi, Romney's "R" resembled Aquafresh, Ted Cruz's flame was compared to a number of logos, including those of Al Jazeera, the Onion, as well as something we'd see from a Pentecostal church, while Rand Paul's is reminiscent of Tinder.
What separates Clinton's logo from these others is it wasn't immediately compared to contemporary corporate brands. Yes, the outline of the "H" is identical to a UK supermarket chain, but it's a supermarket chain that hasn't existed for nearly 30 years and was never in this country. The Clinton "H" is a throwback.
It's clean, simple, and geometric, using a sans serif font and hearkening to the design to design of the '70s, like the New York City MTA signage, developed in 1970.
Retro design has become increasingly common. The firm behind Clinton's logo, Pentagram, is responsible for other logos with a vintage feel, like Bike New York, AirTrain, and Nissan. And the "dutone" look using two colors that popular in the 1970s has been used recently by Bloomberg Politics, Spotify, and Jennifer Lopez.
Retro design is making a comeback, and there's no better sign of that than Clinton's campaign logo. If only Bill followed suit: