"Did you know that there _is_ actually a reason behind the blank space at the bottom of every business card? To get the full picture, we need to go back way bef

"Did you know that there _is_ actually a reason behind the blank space at the bottom of every business card? To get the full picture, we need to go back way before the smartphone age, when a bizarre device, known as the rolodex, ruled office desks" — some blogger in a parallel universe, probably.