1951 establishments in Pennsylvania

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 or even on Thanksgiving. Some stores' sales continue to Monday or for a week.

academic association dedicated to the use of mathematics in industry

diocese of the Catholic Church in the United States

architectural structure