I use a computer at work and one at home. Do I need to buy 2 copies of SuperMemo?
No. You can easily install your SuperMemo on more than one computer. All versions before SuperMemo 2002 fit on a single diskette. However, it is recommended to use SuperMemo in only one location: there where you find more peace for learning. Otherwise you will need to regularly shuttle the learning material between computers. Alternatively, you can learn one subject on one computer, and another subject on another computer.