It dominated a large part of our daily life, drove business, the most common one we know is the yellow guy.
According to wikipedia, The smiley was first introduced to popular culture as part of a promotion by New York radio station WMCA beginning in 1962. Listeners who answered their phone “WMCA Good Guys!” were rewarded with a “WMCA good guys” sweatshirt that incorporated a happy face into its design. Thousands of these sweatshirts were given away.The WMCA smiley was yellow with black dots as eyes, but it had a slightly crooked smile instead of a full smile, and no creases in the mouth.
Happy Birthday Smiley.