Indicators of age
Language and terminology has always been an important indicator in society. In most cultures there are special vocabularies that reveal a user's class, religion, occupation, region of origin, and, in the last century or so, age. I just realized that I still call plain, unlined, white, letter-sized paper "typing paper." This, even though it's been a dozen years or more since I last used a typewriter. Sometimes I miss the ding and the rough physicality of smacking the carriage return on a non-electric typewriter.