What Makes You Feel Old?

[EvergreenDrafts]

Remembering using an abacus... Haha.

[LostInTheMist]

I'm at least young enough that I don't know how to use an abacus OR a slide-rule for that matter. Four function calculator were cheap and available from grade school, and more advanced graphing calculators were available in high school. Of course, now your phone can do all that and more, especially with an internet connection.