(1) Any time in the modern era that predates your conception birthday.
(2) The latter half of the 20th Century; before the Aughts.
(3) The time before email, smartphones and the world wide web.
(4) When your parents grew up.
Before the Aughts
, in times of modern antiquity, people had to sit in meetings, pay attention and actually single-task. Can you imagine not being able to text, update your status, or check-in?