Readers of a certain age might not even know what the yellow pages are. For the rest of us, try not to feel too old as you remember their heyday.

First introduced in the 1880s and a constant presence through much of the 20th century, the yellow pages have gone the way of many print publications in recent decades — either mostly or entirely online. Big and bulky, they were the go-to when you needed a business’ phone number and didn’t know it by heart. Many of us now think of them as a nostalgic reminder of simpler times, but do any of us actually use them anymore?