For sure.
There used to be a time when we had to remember people's phone number to dial them up. No such thing as a cell phone with speed dial.
For example, one time we got dropped off at the mall and wanted to come home early. We tried calling my mom at a payphone but she wasn't home. So we had to think of all the people we knew to see if anyone was available. lol!
Not everybody was listed in the phone book. Remember those things?