Crazy Quiz Wednesday April 6th

Question: In 1980 these made their way onto the market?

Hint 1: You might find these on a piece of office furniture.

Hint 2:If I win I might "put" on "Facebook"-"97.3 The Dawg Is The Real # 1 Radio Station

Hint 3: Be careful about putting this on your "face", people might read you like a "book"

The Answer:

Post-It notes