Manhattan Office Workers Wage Post-It Note War to Taunt Rivals The first message was spotted last week when someone at the firm Horizon Media wrote, "Hi," according to reports.

NYC office workers wage Post-it note battle 03:22. When advertising agencies go to war, it's typically over high-profile clients, ideas and talent. But high above the streets of New York City, two ...

Originally sold as a product called Post ‘n Peel when introduced in four US cities in 1977, the nationwide rollout came on April 6, 1980, along with a new name: Post-it Notes.