The letter P in the Pinterest logo is shaped like a pushpin.

Pinterest’s name joins “pin” and “interest,” and the site’s core action is pinning images to themed boards. Its logo leans into the pun: the lowercase p is drawn so that its stem narrows to a sharp tip, like the pin you would use to tack a note to a corkboard.

The detail is subtle enough that many people never notice it, but it has survived the brand’s redesigns largely unchanged.