On the ‘net: Directory Services
Have you ever decided you needed to contact someone in another area of the world, only to discover you do not have their email address, nor any way to find their email address? You could go to your favorite social media site, of course, but if they are not on any form of social media? Or if they do not put their contact information there? Or—perhaps—this little situation happened before the rise of social media? GASP! From some of the younger readers.