To be honest, after listening to the lecture, some of my original knowledge was subverted. First of all, regarding copyright, my understanding is limited to the writing class this summer. In my presentation in English 1110, the teachers asked as to provide some pictures to express our opinions and these pictures must have citations at the end of powerpoint. At that time I learned that copyright is the right of the owner of the work. When people use these works, they have to quote so as not to infringe upon the copyright of others. At the same time, I also better understand the difference between patent rights and copyrights. In addition, I learned what is copyleft which I never know before. He also relates those things to plagiarism to help us how to avoid that problem. This knowledge is tantamount to allowing me to find sources better when I am writing.