As an assistant high-school track coach, I recorded the results of each home meet and made copies for all the coaches. But because our track shed did not have electricity, I had to use carbon paper. A freshman team member offered to help, and I showed her how to place the carbon paper shiny side down so that the image would transfer to the sheet beneath it.
"What will they think of next?" she said in astonishment. "Pretty soon we won’t need copy machines anymore."