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Whiteboards became commercially available in the early 1960s, but did not become widely used until 30 years later. Early whiteboards needed to be wiped with a damp cloth and markers had a tendency to leave marks behind, even after the board was erased. [2] [3] In 1974, whiteboards were proposed as additional equipment for Soviet schools. [4]
William Brownie Garden (December 2, 1869 – 1960) was a Scottish inventor and entrepreneur. He is probably best known for his invention of the "revolving blackboard". Up until his death at age 90, in 1960, the ‘Inventor’ still worked at his own bench in the factory, from which came innovations like an improved saw which cut ten times quicker than any other, and an eight-wheeled car for ...
Earlier references date back to the 1950s and 1960s. Jie Zhang, a professor of marketing at the University of Maryland’s Robert H. Smith School of Business, points to a 1951 mention of “Black ...
They use black tablets for the children in the schools, and write upon them along the long side, not the broadside, writing with a white material from the left to the right. [ 13 ] The first classroom uses of large blackboards are difficult to date, but they were used for music education and composition in Europe as far back as the 16th century ...
In the 1960s, police in Philadelphia started using the term to describe the hectic, overcrowded day that came as families rushed into the city ahead of the weekend's annual Army-Navy football game ...
Black Friday is the Friday after Thanksgiving in the United States. It traditionally marks the start of the Christmas shopping season and is the busiest shopping day of the year in the United States. Many stores offer highly promoted sales at heavily discounted prices and often open early, sometimes as early as midnight [2] or even on Thanksgiving.
In the late 1980s, the term was re-invented and promoted by retailers to denote the discounts offered to the seasonal shoppers and it spread nationwide across the United States. [2] Through the years, discount-offer days using the "Black Friday" moniker were used for additional dates of the year, such as Amazon's "Black Friday in July" of 2015. [7]
1950 Red River flood or Black Friday flood in Winnipeg, Manitoba, Canada; Black Friday (1959), the cancellation of the CF-105 Arrow and Orenda Iroquois engine programs in Malton, Ontario, Canada; Black Friday (1960), San Francisco protest against the House Un-American Activities Committee; Black Friday (1978), massacre of protesters in Iran