Profile America —Saturday, February 8th. Even in a world increasingly reliant on digital files and printouts, there's still a great need for photocopies. What is now old school was a breakthrough invention of a man named Chester Carlson, born on this date in 1906. In 1938, he developed a method of making dry copies of documents on plain paper, known as xerography -- which we take for granted in using photocopiers today. Before his invention, copies were made either by using carbon paper when typing or a mimeograph machine for large numbers of copies. Both were messy and not always legible. The first commercial copiers became available in 1959. Now, making copiers is a $2.2 billion a year business for some 230 companies in the U.S. You can find more facts about America from the U.S. Census Bureau, online at <www.census.gov>.