Once when I was at university, I was working in the computer lab in my university library. I was working on a very important paper for an English class. The paper was about 15 pages long. I had spent about two weeks writing the paper. When I finished the paper, I got a big smile on my face, and I left the computer lab. The next day when I went to print the paper, I could not find my floppy disk. I searched my bag and my car, but had no luck. Then I realized that I forgot it in the computer that I was using in the computer lab. I ran back to the computer lab, but the disk was not in the computer. I asked the technician, but he did not have it. Somebody had taken it. I had to write the paper again, from memory. I was incredibly frustrated. You should always check that you have everything with you before you leave a computer lab.